Class 8 Science Keeping Time with the Skies Sample Paper Style Practice
Sample Paper Style Practice for Class 8 Science Keeping Time with the Skies. Try first, then reveal the answer. These are exam-oriented practice items, not copied board papers.
Practice questions aligned to NCERT topics used in CBSE classrooms. These are original exam-oriented questions for revision — not official CBSE board papers and not a guarantee of any exam question. Always match the textbook issued by your school and the latest PDFs on ncert.nic.in and cbseacademic.nic.in.
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Practice set
Q1MCQ1 markEasyRevision pick
Choose the correct statement related to Keeping Time with the Skies in the chapter Keeping Time with the Skies.
A. A day is linked to Earth’s rotation
B. CBSE often tests a concept by asking a daily-life example from the same chapter
C. Calendars organise time
D. Keeping Time with the Skies is an NCERT chapter taught in CBSE Class 8 Science
Answer
A. A day is linked to Earth’s rotation
Explanation
A day is linked to Earth’s rotation. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q2MCQ1 markEasy
Choose the correct statement related to Keeping Time with the Skies in the chapter Keeping Time with the Skies.
A. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
B. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
C. Moon cycle ~ 29.5 days
D. A year to revolution
Answer
D. A year to revolution
Explanation
A year to revolution. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q3MCQ1 markEasy
Choose the correct statement related to Keeping Time with the Skies in the chapter Keeping Time with the Skies.
A. Indian calendars are discussed in the lesson — follow the text
B. Every chapter ends with keywords or a summary that is useful for one-mark answers
C. Calendars organise time
D. Write three points from Keeping Time with the Skies in your own words; that is enough for a short-answer start
Answer
C. Calendars organise time
Explanation
Calendars organise time. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q4MCQ1 markEasy
Choose the correct statement related to Moon cycle ~ 29 in the chapter Keeping Time with the Skies.
A. Use the terms used in the NCERT book; do not replace them with unofficial names
B. Moon cycle ~ 29.5 days
C. Keeping Time with the Skies is an NCERT chapter taught in CBSE Class 8 Science
D. CBSE often tests a concept by asking a daily-life example from the same chapter
Answer
B. Moon cycle ~ 29.5 days
Explanation
Moon cycle ~ 29.5 days. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q5MCQ1 markModerateRevision pick
Choose the correct statement related to Keeping Time with the Skies in the chapter Keeping Time with the Skies.
A. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
B. Indian calendars are discussed in the lesson — follow the text
C. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
D. Mix MCQs with short answers so you remember both facts and explanations from Keeping Time with the Skies
Answer
B. Indian calendars are discussed in the lesson — follow the text
Explanation
Indian calendars are discussed in the lesson — follow the text. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q6MCQ1 markEasy
Choose the correct statement related to Keeping Time with the Skies in the chapter Keeping Time with the Skies.
A. Keeping Time with the Skies is an NCERT chapter taught in CBSE Class 8 Science
B. Moon cycle ~ 29.5 days
C. Every chapter ends with keywords or a summary that is useful for one-mark answers
D. Write three points from Keeping Time with the Skies in your own words; that is enough for a short-answer start
Answer
A. Keeping Time with the Skies is an NCERT chapter taught in CBSE Class 8 Science
Explanation
Keeping Time with the Skies is an NCERT chapter taught in CBSE Class 8 Science. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q7MCQ1 markEasy
Choose the correct statement related to Textbook first in the chapter Keeping Time with the Skies.
A. The textbook says the opposite of this statement
B. CBSE often tests a concept by asking a daily-life example from the same chapter
C. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
D. Use the terms used in the NCERT book; do not replace them with unofficial names
Answer
C. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
Explanation
Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q8MCQ1 markEasy
Choose the correct statement related to Keywords in the chapter Keeping Time with the Skies.
A. This happens only in a laboratory and never in daily life
B. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
C. Mix MCQs with short answers so you remember both facts and explanations from Keeping Time with the Skies
D. Every chapter ends with keywords or a summary that is useful for one-mark answers
Answer
D. Every chapter ends with keywords or a summary that is useful for one-mark answers
Explanation
Every chapter ends with keywords or a summary that is useful for one-mark answers. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q9MCQ1 markEasyRevision pick
Choose the correct statement related to Examples in the chapter Keeping Time with the Skies.
A. This idea is not part of the NCERT chapter
B. A day is linked to Earth’s rotation
C. CBSE often tests a concept by asking a daily-life example from the same chapter
D. Write three points from Keeping Time with the Skies in your own words; that is enough for a short-answer start
Answer
C. CBSE often tests a concept by asking a daily-life example from the same chapter
Explanation
CBSE often tests a concept by asking a daily-life example from the same chapter. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q10MCQ1 markModerate
Choose the correct statement related to Diagrams in the chapter Keeping Time with the Skies.
A. Use the terms used in the NCERT book; do not replace them with unofficial names
B. The textbook says the opposite of this statement
C. A year to revolution
D. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
Answer
D. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
Explanation
If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q11MCQ1 markEasy
Choose the correct statement related to Revision in the chapter Keeping Time with the Skies.
A. Mix MCQs with short answers so you remember both facts and explanations from Keeping Time with the Skies
B. Calendars organise time
C. This happens only in a laboratory and never in daily life
D. Write three points from Keeping Time with the Skies in your own words; that is enough for a short-answer start
Answer
D. Write three points from Keeping Time with the Skies in your own words; that is enough for a short-answer start
Explanation
Write three points from Keeping Time with the Skies in your own words; that is enough for a short-answer start. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q12MCQ1 markEasy
Choose the correct statement related to Accuracy in the chapter Keeping Time with the Skies.
A. Moon cycle ~ 29.5 days
B. A day is linked to Earth’s rotation
C. This idea is not part of the NCERT chapter
D. Use the terms used in the NCERT book; do not replace them with unofficial names
Answer
D. Use the terms used in the NCERT book; do not replace them with unofficial names
Explanation
Use the terms used in the NCERT book; do not replace them with unofficial names. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q13MCQ1 markEasyRevision pick
Choose the correct statement related to Practice in the chapter Keeping Time with the Skies.
A. A year to revolution
B. The textbook says the opposite of this statement
C. Mix MCQs with short answers so you remember both facts and explanations from Keeping Time with the Skies
D. Indian calendars are discussed in the lesson — follow the text
Answer
C. Mix MCQs with short answers so you remember both facts and explanations from Keeping Time with the Skies
Explanation
Mix MCQs with short answers so you remember both facts and explanations from Keeping Time with the Skies. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q14MCQ1 markEasy
Choose the correct statement related to Keeping Time with the Skies in the chapter Keeping Time with the Skies.
A. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
B. Moon cycle ~ 29.5 days
C. This happens only in a laboratory and never in daily life
D. A day is linked to Earth’s rotation
Answer
D. A day is linked to Earth’s rotation
Explanation
A day is linked to Earth’s rotation. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q15MCQ1 markModerate
Choose the correct statement related to Keeping Time with the Skies in the chapter Keeping Time with the Skies.
A. Every chapter ends with keywords or a summary that is useful for one-mark answers
B. Indian calendars are discussed in the lesson — follow the text
C. A day is linked to Earth’s rotation
D. A year to revolution
Answer
D. A year to revolution
Explanation
A year to revolution. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q16MCQ1 markEasy
Choose the correct statement related to Keeping Time with the Skies in the chapter Keeping Time with the Skies.
A. CBSE often tests a concept by asking a daily-life example from the same chapter
B. A year to revolution
C. Keeping Time with the Skies is an NCERT chapter taught in CBSE Class 8 Science
D. Calendars organise time
Answer
D. Calendars organise time
Explanation
Calendars organise time. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q17MCQ1 markEasyRevision pick
Choose the correct statement related to Moon cycle ~ 29 in the chapter Keeping Time with the Skies.
A. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
B. Moon cycle ~ 29.5 days
C. Calendars organise time
D. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
Answer
B. Moon cycle ~ 29.5 days
Explanation
Moon cycle ~ 29.5 days. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q18MCQ1 markEasy
Choose the correct statement related to Keeping Time with the Skies in the chapter Keeping Time with the Skies.
A. Indian calendars are discussed in the lesson — follow the text
B. Every chapter ends with keywords or a summary that is useful for one-mark answers
C. Moon cycle ~ 29.5 days
D. Write three points from Keeping Time with the Skies in your own words; that is enough for a short-answer start
Answer
A. Indian calendars are discussed in the lesson — follow the text
Explanation
Indian calendars are discussed in the lesson — follow the text. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q19MCQ1 markEasy
Choose the correct statement related to Keeping Time with the Skies in the chapter Keeping Time with the Skies.
A. A year to revolution
B. Indian calendars are discussed in the lesson — follow the text
C. Keeping Time with the Skies is an NCERT chapter taught in CBSE Class 8 Science
D. This topic is only for college
Answer
C. Keeping Time with the Skies is an NCERT chapter taught in CBSE Class 8 Science
Explanation
Keeping Time with the Skies is an NCERT chapter taught in CBSE Class 8 Science. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q20MCQ1 markModerate
Choose the correct statement related to Textbook first in the chapter Keeping Time with the Skies.
A. Mix MCQs with short answers so you remember both facts and explanations from Keeping Time with the Skies
B. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
C. Keeping Time with the Skies is an NCERT chapter taught in CBSE Class 8 Science
D. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
Answer
B. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
Explanation
Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q413 Mark3 marksModerateRevision pick
Explain Keeping Time with the Skies in about three points, with one example.
Answer
A year to revolution. Example: Use a situation from the NCERT activity or a labelled diagram in this chapter.
Explanation
Three-mark questions want a short explanation, not a full essay. Link the idea to a figure or an activity.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q423 Mark3 marksModerate
Explain Keeping Time with the Skies in about three points, with one example.
Answer
Calendars organise time. Example: Use a situation from the NCERT activity or a labelled diagram in this chapter.
Explanation
Three-mark questions want a short explanation, not a full essay. Link the idea to a figure or an activity.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q433 Mark3 marksModerate
Explain Moon cycle ~ 29 in about three points, with one example.
Answer
Moon cycle ~ 29.5 days. Example: Use a situation from the NCERT activity or a labelled diagram in this chapter.
Explanation
Three-mark questions want a short explanation, not a full essay. Link the idea to a figure or an activity.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q443 Mark3 marksDifficult
Explain Keeping Time with the Skies in about three points, with one example.
Answer
Indian calendars are discussed in the lesson — follow the text. Example: Use a situation from the NCERT activity or a labelled diagram in this chapter.
Explanation
Three-mark questions want a short explanation, not a full essay. Link the idea to a figure or an activity.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q453 Mark3 marksModerateRevision pick
Explain Keeping Time with the Skies in about three points, with one example.
Answer
Keeping Time with the Skies is an NCERT chapter taught in CBSE Class 8 Science. Example: Use a situation from the NCERT activity or a labelled diagram in this chapter.
Explanation
Three-mark questions want a short explanation, not a full essay. Link the idea to a figure or an activity.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q463 Mark3 marksModerate
Explain Textbook first in about three points, with one example.
Answer
Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions. Example: Use a situation from the NCERT activity or a labelled diagram in this chapter.
Explanation
Three-mark questions want a short explanation, not a full essay. Link the idea to a figure or an activity.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q473 Mark3 marksModerate
Explain Keywords in about three points, with one example.
Answer
Every chapter ends with keywords or a summary that is useful for one-mark answers. Example: Use a situation from the NCERT activity or a labelled diagram in this chapter.
Explanation
Three-mark questions want a short explanation, not a full essay. Link the idea to a figure or an activity.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q483 Mark3 marksDifficult
Explain Examples in about three points, with one example.
Answer
CBSE often tests a concept by asking a daily-life example from the same chapter. Example: Use a situation from the NCERT activity or a labelled diagram in this chapter.
Explanation
Three-mark questions want a short explanation, not a full essay. Link the idea to a figure or an activity.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q555 Mark5 marksModerate
Write a long answer on Keeping Time with the Skies. Include definition, explanation and one application.
Answer
Keeping Time with the Skies — Calendars organise time. Explain the idea in order (definition → working → result). End with one application from daily life or a numerical/diagram if the chapter has one.
Explanation
Long answers are marked for structure. Use headings or numbered steps so the examiner can see each part.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q565 Mark5 marksModerate
Write a long answer on Moon cycle ~ 29. Include definition, explanation and one application.
Answer
Moon cycle ~ 29 — Moon cycle ~ 29.5 days. Explain the idea in order (definition → working → result). End with one application from daily life or a numerical/diagram if the chapter has one.
Explanation
Long answers are marked for structure. Use headings or numbered steps so the examiner can see each part.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q575 Mark5 marksDifficultRevision pick
Write a long answer on Keeping Time with the Skies. Include definition, explanation and one application.
Answer
Keeping Time with the Skies — Indian calendars are discussed in the lesson — follow the text. Explain the idea in order (definition → working → result). End with one application from daily life or a numerical/diagram if the chapter has one.
Explanation
Long answers are marked for structure. Use headings or numbered steps so the examiner can see each part.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q585 Mark5 marksModerate
Write a long answer on Keeping Time with the Skies. Include definition, explanation and one application.
Answer
Keeping Time with the Skies — Keeping Time with the Skies is an NCERT chapter taught in CBSE Class 8 Science. Explain the idea in order (definition → working → result). End with one application from daily life or a numerical/diagram if the chapter has one.
Explanation
Long answers are marked for structure. Use headings or numbered steps so the examiner can see each part.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q595 Mark5 marksModerate
Write a long answer on Textbook first. Include definition, explanation and one application.
Answer
Textbook first — Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions. Explain the idea in order (definition → working → result). End with one application from daily life or a numerical/diagram if the chapter has one.
Explanation
Long answers are marked for structure. Use headings or numbered steps so the examiner can see each part.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q605 Mark5 marksDifficult
Write a long answer on Keywords. Include definition, explanation and one application.
Answer
Keywords — Every chapter ends with keywords or a summary that is useful for one-mark answers. Explain the idea in order (definition → working → result). End with one application from daily life or a numerical/diagram if the chapter has one.
Explanation
Long answers are marked for structure. Use headings or numbered steps so the examiner can see each part.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q61Assertion and Reason1 markModerate
Assertion (A): CBSE often tests a concept by asking a daily-life example from the same chapter.
Reason (R): Examples is a key idea in the chapter Keeping Time with the Skies.
Choose the correct option.
A. Both A and R are true, and R is the correct explanation of A.
B. Both A and R are true, and R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer
A. Both A and R are true, and R is the correct explanation of A.
Explanation
Read Assertion and Reason separately first. Here both match the textbook idea, and R explains why A is taught in this chapter.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q62Assertion and Reason1 markModerate
Assertion (A): If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures.
Reason (R): Diagrams is a key idea in the chapter Keeping Time with the Skies.
Choose the correct option.
A. Both A and R are true, and R is the correct explanation of A.
B. Both A and R are true, and R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer
A. Both A and R are true, and R is the correct explanation of A.
Explanation
Read Assertion and Reason separately first. Here both match the textbook idea, and R explains why A is taught in this chapter.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q63Assertion and Reason1 markModerate
Assertion (A): Write three points from Keeping Time with the Skies in your own words; that is enough for a short-answer start.
Reason (R): Revision is a key idea in the chapter Keeping Time with the Skies.
Choose the correct option.
A. Both A and R are true, and R is the correct explanation of A.
B. Both A and R are true, and R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer
A. Both A and R are true, and R is the correct explanation of A.
Explanation
Read Assertion and Reason separately first. Here both match the textbook idea, and R explains why A is taught in this chapter.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q64Assertion and Reason1 markDifficult
Assertion (A): Use the terms used in the NCERT book; do not replace them with unofficial names.
Reason (R): Accuracy is a key idea in the chapter Keeping Time with the Skies.
Choose the correct option.
A. Both A and R are true, and R is the correct explanation of A.
B. Both A and R are true, and R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer
A. Both A and R are true, and R is the correct explanation of A.
Explanation
Read Assertion and Reason separately first. Here both match the textbook idea, and R explains why A is taught in this chapter.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q65Assertion and Reason1 markModerate
Assertion (A): Mix MCQs with short answers so you remember both facts and explanations from Keeping Time with the Skies.
Reason (R): Practice is a key idea in the chapter Keeping Time with the Skies.
Choose the correct option.
A. Both A and R are true, and R is the correct explanation of A.
B. Both A and R are true, and R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer
A. Both A and R are true, and R is the correct explanation of A.
Explanation
Read Assertion and Reason separately first. Here both match the textbook idea, and R explains why A is taught in this chapter.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q66Assertion and Reason1 markModerate
Assertion (A): A day is linked to Earth’s rotation.
Reason (R): Keeping Time with the Skies is a key idea in the chapter Keeping Time with the Skies.
Choose the correct option.
A. Both A and R are true, and R is the correct explanation of A.
B. Both A and R are true, and R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer
A. Both A and R are true, and R is the correct explanation of A.
Explanation
Read Assertion and Reason separately first. Here both match the textbook idea, and R explains why A is taught in this chapter.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q67Assertion and Reason1 markModerate
Assertion (A): A year to revolution.
Reason (R): Keeping Time with the Skies is a key idea in the chapter Keeping Time with the Skies.
Choose the correct option.
A. Both A and R are true, and R is the correct explanation of A.
B. Both A and R are true, and R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer
A. Both A and R are true, and R is the correct explanation of A.
Explanation
Read Assertion and Reason separately first. Here both match the textbook idea, and R explains why A is taught in this chapter.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q68Assertion and Reason1 markDifficult
Assertion (A): Calendars organise time.
Reason (R): Keeping Time with the Skies is a key idea in the chapter Keeping Time with the Skies.
Choose the correct option.
A. Both A and R are true, and R is the correct explanation of A.
B. Both A and R are true, and R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer
A. Both A and R are true, and R is the correct explanation of A.
Explanation
Read Assertion and Reason separately first. Here both match the textbook idea, and R explains why A is taught in this chapter.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q69Case Based4 marksModerateRevision pick
A student is revising Keeping Time with the Skies and notes: “Moon cycle ~ 29.5 days.” Using this case, answer: (i) Name the idea. (ii) State it in your own words. (iii) Give one classroom or daily-life use.
Answer
(i) Moon cycle ~ 29.
(ii) Moon cycle ~ 29.5 days.
(iii) Apply it in a school experiment, a labelled diagram, or a situation described in the NCERT chapter.
Explanation
Case-based items recycle a short story. Pull the fact out first, then apply it. This is original practice in CBSE case style — not a copied board paper.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q70Case Based4 marksModerate
A student is revising Keeping Time with the Skies and notes: “Indian calendars are discussed in the lesson — follow the text.” Using this case, answer: (i) Name the idea. (ii) State it in your own words. (iii) Give one classroom or daily-life use.
Answer
(i) Keeping Time with the Skies.
(ii) Indian calendars are discussed in the lesson — follow the text.
(iii) Apply it in a school experiment, a labelled diagram, or a situation described in the NCERT chapter.
Explanation
Case-based items recycle a short story. Pull the fact out first, then apply it. This is original practice in CBSE case style — not a copied board paper.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q71Case Based4 marksModerate
A student is revising Keeping Time with the Skies and notes: “Keeping Time with the Skies is an NCERT chapter taught in CBSE Class 8 Science.” Using this case, answer: (i) Name the idea. (ii) State it in your own words. (iii) Give one classroom or daily-life use.
Answer
(i) Keeping Time with the Skies.
(ii) Keeping Time with the Skies is an NCERT chapter taught in CBSE Class 8 Science.
(iii) Apply it in a school experiment, a labelled diagram, or a situation described in the NCERT chapter.
Explanation
Case-based items recycle a short story. Pull the fact out first, then apply it. This is original practice in CBSE case style — not a copied board paper.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q72Case Based4 marksDifficult
A student is revising Keeping Time with the Skies and notes: “Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions.” Using this case, answer: (i) Name the idea. (ii) State it in your own words. (iii) Give one classroom or daily-life use.
Answer
(i) Textbook first.
(ii) Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions.
(iii) Apply it in a school experiment, a labelled diagram, or a situation described in the NCERT chapter.
Explanation
Case-based items recycle a short story. Pull the fact out first, then apply it. This is original practice in CBSE case style — not a copied board paper.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q73Case Based4 marksModerateRevision pick
A student is revising Keeping Time with the Skies and notes: “Every chapter ends with keywords or a summary that is useful for one-mark answers.” Using this case, answer: (i) Name the idea. (ii) State it in your own words. (iii) Give one classroom or daily-life use.
Answer
(i) Keywords.
(ii) Every chapter ends with keywords or a summary that is useful for one-mark answers.
(iii) Apply it in a school experiment, a labelled diagram, or a situation described in the NCERT chapter.
Explanation
Case-based items recycle a short story. Pull the fact out first, then apply it. This is original practice in CBSE case style — not a copied board paper.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q74Case Based4 marksModerate
A student is revising Keeping Time with the Skies and notes: “CBSE often tests a concept by asking a daily-life example from the same chapter.” Using this case, answer: (i) Name the idea. (ii) State it in your own words. (iii) Give one classroom or daily-life use.
Answer
(i) Examples.
(ii) CBSE often tests a concept by asking a daily-life example from the same chapter.
(iii) Apply it in a school experiment, a labelled diagram, or a situation described in the NCERT chapter.
Explanation
Case-based items recycle a short story. Pull the fact out first, then apply it. This is original practice in CBSE case style — not a copied board paper.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q75Case Based4 marksModerate
A student is revising Keeping Time with the Skies and notes: “If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures.” Using this case, answer: (i) Name the idea. (ii) State it in your own words. (iii) Give one classroom or daily-life use.
Answer
(i) Diagrams.
(ii) If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures.
(iii) Apply it in a school experiment, a labelled diagram, or a situation described in the NCERT chapter.
Explanation
Case-based items recycle a short story. Pull the fact out first, then apply it. This is original practice in CBSE case style — not a copied board paper.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q76Case Based4 marksDifficult
A student is revising Keeping Time with the Skies and notes: “Write three points from Keeping Time with the Skies in your own words; that is enough for a short-answer start.” Using this case, answer: (i) Name the idea. (ii) State it in your own words. (iii) Give one classroom or daily-life use.
Answer
(i) Revision.
(ii) Write three points from Keeping Time with the Skies in your own words; that is enough for a short-answer start.
(iii) Apply it in a school experiment, a labelled diagram, or a situation described in the NCERT chapter.
Explanation
Case-based items recycle a short story. Pull the fact out first, then apply it. This is original practice in CBSE case style — not a copied board paper.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q77Competency Based3 marksModerateRevision pick
Competency practice: A classmate can recall the heading Accuracy but cannot explain it. How will you teach it in two steps using the textbook idea?
Answer
Step 1: State the fact — Use the terms used in the NCERT book; do not replace them with unofficial names. Step 2: Show one example or diagram from the chapter and ask the classmate to repeat it in their own words.
Explanation
Competency-based items check whether you can use a concept, not only name it. Teach-back is a simple way to prove understanding.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q78Competency Based3 marksDifficult
Competency practice: A classmate can recall the heading Practice but cannot explain it. How will you teach it in two steps using the textbook idea?
Answer
Step 1: State the fact — Mix MCQs with short answers so you remember both facts and explanations from Keeping Time with the Skies. Step 2: Show one example or diagram from the chapter and ask the classmate to repeat it in their own words.
Explanation
Competency-based items check whether you can use a concept, not only name it. Teach-back is a simple way to prove understanding.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q79Competency Based3 marksModerate
Competency practice: A classmate can recall the heading Keeping Time with the Skies but cannot explain it. How will you teach it in two steps using the textbook idea?
Answer
Step 1: State the fact — A day is linked to Earth’s rotation. Step 2: Show one example or diagram from the chapter and ask the classmate to repeat it in their own words.
Explanation
Competency-based items check whether you can use a concept, not only name it. Teach-back is a simple way to prove understanding.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q80Competency Based3 marksModerate
Competency practice: A classmate can recall the heading Keeping Time with the Skies but cannot explain it. How will you teach it in two steps using the textbook idea?
Answer
Step 1: State the fact — A year to revolution. Step 2: Show one example or diagram from the chapter and ask the classmate to repeat it in their own words.
Explanation
Competency-based items check whether you can use a concept, not only name it. Teach-back is a simple way to prove understanding.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q81Competency Based3 marksDifficultRevision pick
Competency practice: A classmate can recall the heading Keeping Time with the Skies but cannot explain it. How will you teach it in two steps using the textbook idea?
Answer
Step 1: State the fact — Calendars organise time. Step 2: Show one example or diagram from the chapter and ask the classmate to repeat it in their own words.
Explanation
Competency-based items check whether you can use a concept, not only name it. Teach-back is a simple way to prove understanding.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q82Competency Based3 marksModerate
Competency practice: A classmate can recall the heading Moon cycle ~ 29 but cannot explain it. How will you teach it in two steps using the textbook idea?
Answer
Step 1: State the fact — Moon cycle ~ 29.5 days. Step 2: Show one example or diagram from the chapter and ask the classmate to repeat it in their own words.
Explanation
Competency-based items check whether you can use a concept, not only name it. Teach-back is a simple way to prove understanding.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q83Competency Based3 marksModerate
Competency practice: A classmate can recall the heading Keeping Time with the Skies but cannot explain it. How will you teach it in two steps using the textbook idea?
Answer
Step 1: State the fact — Indian calendars are discussed in the lesson — follow the text. Step 2: Show one example or diagram from the chapter and ask the classmate to repeat it in their own words.
Explanation
Competency-based items check whether you can use a concept, not only name it. Teach-back is a simple way to prove understanding.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q84Competency Based3 marksDifficult
Competency practice: A classmate can recall the heading Keeping Time with the Skies but cannot explain it. How will you teach it in two steps using the textbook idea?
Answer
Step 1: State the fact — Keeping Time with the Skies is an NCERT chapter taught in CBSE Class 8 Science. Step 2: Show one example or diagram from the chapter and ask the classmate to repeat it in their own words.
Explanation
Competency-based items check whether you can use a concept, not only name it. Teach-back is a simple way to prove understanding.
Meta
Class: Class 8 · Subject: Science · Chapter: Keeping Time with the Skies · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
FAQs
Are these official CBSE board questions?
No. They are original practice questions aligned to NCERT topics used in CBSE classrooms. Official sample papers are published on cbseacademic.nic.in.
Will these questions appear in the board exam?
Nobody can promise a question. Use them for revision of frequently tested concepts and exam-style practice.
Is the chapter list the latest NCERT list?
Yes, the catalog follows current NCERT textbooks used in CBSE schools (including new middle-stage books such as Ganita Prakash and Curiosity). Always match the book issued by your school.
How should I use the 100 questions?
Try the question first, then tap Show answer. Mix MCQs with long answers. Revise formulas and diagrams from the textbook alongside this set.
Where are NCERT solutions?
Open the NCERT-style practice link on this subject or chapter. For word-for-word textbook exercise answers, use the NCERT book itself; we do not copy solution keys from other websites.
What is the suggested URL pattern?
Hub /cbse/, then /cbse/class-8/, then subject and chapter slugs.
Why is this a separate URL?
So students searching for “Sample Paper Style Practice” land on a filtered set, while the chapter page remains the full 100-question bank. Same facts, different search intent.
Today's 3-step path
Follow this loop every day: mixed test, current affairs, then today's subject. A new set arrives tomorrow.
