Class 8 Science Our Home: Earth, A Unique Life-Sustaining Planet Most Important Questions
Most Important Questions for Class 8 Science Our Home: Earth, A Unique Life-Sustaining Planet. 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 Our Home: Earth, A Unique Life-Sustaining Planet in the chapter Our Home: Earth, A Unique Life-Sustaining Planet.
A. CBSE often tests a concept by asking a daily-life example from the same chapter
B. Our Home: Earth, A Unique Life-Sustaining Planet is an NCERT chapter taught in CBSE Class 8 Science
C. Atmosphere, water and suitable temperature
D. Earth is unique in the solar system for life as we know it
Answer
C. Atmosphere, water and suitable temperature
Explanation
Atmosphere, water and suitable temperature. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 8 · Subject: Science · Chapter: Our Home: Earth, A Unique Life-Sustaining Planet · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q5MCQ1 markModerateRevision pick
Choose the correct statement related to The Goldilocks idea in school language in the chapter Our Home: Earth, A Unique Life-Sustaining Planet.
A. The Goldilocks idea in school language: not too hot, not too cold
B. Mix MCQs with short answers so you remember both facts and explanations from Our Home: Earth, A Unique Life-Sustaining Planet
C. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
D. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
Answer
A. The Goldilocks idea in school language: not too hot, not too cold
Explanation
The Goldilocks idea in school language: not too hot, not too cold. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 8 · Subject: Science · Chapter: Our Home: Earth, A Unique Life-Sustaining Planet · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q9MCQ1 markEasyRevision pick
Choose the correct statement related to Examples in the chapter Our Home: Earth, A Unique Life-Sustaining Planet.
A. Atmosphere, water and suitable temperature
B. This idea is not part of the NCERT chapter
C. Write three points from Our Home: Earth, A Unique Life-Sustaining Planet in your own words; that is enough for a short-answer start
D. CBSE often tests a concept by asking a daily-life example from the same chapter
Answer
D. 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: Our Home: Earth, A Unique Life-Sustaining Planet · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q13MCQ1 markEasyRevision pick
Choose the correct statement related to Practice in the chapter Our Home: Earth, A Unique Life-Sustaining Planet.
A. Ozone and atmosphere as in the lesson
B. The textbook says the opposite of this statement
C. Mix MCQs with short answers so you remember both facts and explanations from Our Home: Earth, A Unique Life-Sustaining Planet
D. The Goldilocks idea in school language: not too hot, not too cold
Answer
C. Mix MCQs with short answers so you remember both facts and explanations from Our Home: Earth, A Unique Life-Sustaining Planet
Explanation
Mix MCQs with short answers so you remember both facts and explanations from Our Home: Earth, A Unique Life-Sustaining Planet. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 8 · Subject: Science · Chapter: Our Home: Earth, A Unique Life-Sustaining Planet · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q17MCQ1 markEasyRevision pick
Choose the correct statement related to Our Home: Earth, A Unique Life-Sustaining Planet in the chapter Our Home: Earth, A Unique Life-Sustaining Planet.
A. Earth is unique in the solar system for life as we know it
B. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
C. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
D. Protect the planet
Answer
D. Protect the planet
Explanation
Protect the planet. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 8 · Subject: Science · Chapter: Our Home: Earth, A Unique Life-Sustaining Planet · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q413 Mark3 marksModerateRevision pick
Explain Our Home: Earth, A Unique Life-Sustaining Planet in about three points, with one example.
Answer
Ozone and atmosphere as in the lesson. 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: Our Home: Earth, A Unique Life-Sustaining Planet · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q453 Mark3 marksModerateRevision pick
Explain Our Home: Earth, A Unique Life-Sustaining Planet in about three points, with one example.
Answer
Our Home: Earth, A Unique Life-Sustaining Planet 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: Our Home: Earth, A Unique Life-Sustaining Planet · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q575 Mark5 marksDifficultRevision pick
Write a long answer on The Goldilocks idea in school language. Include definition, explanation and one application.
Answer
The Goldilocks idea in school language — The Goldilocks idea in school language: not too hot, not too cold. 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: Our Home: Earth, A Unique Life-Sustaining Planet · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q69Case Based4 marksModerateRevision pick
A student is revising Our Home: Earth, A Unique Life-Sustaining Planet and notes: “Protect the planet.” 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) Our Home: Earth, A Unique Life-Sustaining Planet.
(ii) Protect the planet.
(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: Our Home: Earth, A Unique Life-Sustaining Planet · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q73Case Based4 marksModerateRevision pick
A student is revising Our Home: Earth, A Unique Life-Sustaining Planet 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: Our Home: Earth, A Unique Life-Sustaining Planet · 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: Our Home: Earth, A Unique Life-Sustaining Planet · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q81Competency Based3 marksDifficultRevision pick
Competency practice: A classmate can recall the heading Our Home: Earth, A Unique Life-Sustaining Planet but cannot explain it. How will you teach it in two steps using the textbook idea?
Answer
Step 1: State the fact — Earth is unique in the solar system for life as we know it. 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: Our Home: Earth, A Unique Life-Sustaining Planet · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q93HOTS3 marksDifficultRevision pick
HOTS: If someone ignored the idea “Ozone and atmosphere as in the lesson”, what mistake could they make while solving a question from Our Home: Earth, A Unique Life-Sustaining Planet?
Answer
They would use the wrong term or the reverse relation. Remember: Ozone and atmosphere as in the lesson. Always check the NCERT definition before jumping to a formula or a long explanation.
Explanation
HOTS items ask you to predict an error. That is still chapter revision — not a claim that this exact wording will appear in the board exam.
Meta
Class: Class 8 · Subject: Science · Chapter: Our Home: Earth, A Unique Life-Sustaining Planet · 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 “Most Important Questions” 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.
