Grade 8 · Science

Grade 8 Science questions and answers

Cells, genetics, body systems, and Earth science. Written in American English for students, parents, and teachers in the United States.

Topics

Practice quiz

Question and answer list

Each item is a 4-option MCQ. Open a question, tap A–D. Green is correct, red is wrong. Original US classroom practice — not a state test copy.

1. Grade 8 science — earth systems: practice check 34 — the reliable next step is

Tap A, B, C or D.

Answer: A) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

2. Grade 8 science — earth systems: practice check 35 — the reliable next step is

Tap A, B, C or D.

Answer: A) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

3. Grade 8 science — earth systems: practice check 36 — the reliable next step is

Tap A, B, C or D.

Answer: A) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

4. Grade 8 science — earth systems: practice check 37 — the reliable next step is

Tap A, B, C or D.

Answer: A) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

5. Grade 8 science — earth systems: practice check 38 — the reliable next step is

Tap A, B, C or D.

Answer: C) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

6. Grade 8 science — earth systems: practice check 39 — the reliable next step is

Tap A, B, C or D.

Answer: C) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

7. Grade 8 science — earth systems: practice check 40 — the reliable next step is

Tap A, B, C or D.

Answer: A) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

8. Grade 8 science — earth systems: practice check 41 — the reliable next step is

Tap A, B, C or D.

Answer: A) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

9. Grade 8 science — earth systems: practice check 42 — the reliable next step is

Tap A, B, C or D.

Answer: A) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

10. Grade 8 science — earth systems: practice check 43 — the reliable next step is

Tap A, B, C or D.

Answer: A) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

11. Grade 8 science — earth systems: practice check 44 — the reliable next step is

Tap A, B, C or D.

Answer: B) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

12. Grade 8 science — earth systems: practice check 45 — the reliable next step is

Tap A, B, C or D.

Answer: B) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

13. Grade 8 science — earth systems: practice check 46 — the reliable next step is

Tap A, B, C or D.

Answer: B) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

14. Grade 8 science — earth systems: practice check 47 — the reliable next step is

Tap A, B, C or D.

Answer: B) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

15. Grade 8 science — earth systems: practice check 48 — the reliable next step is

Tap A, B, C or D.

Answer: D) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

16. Grade 8 science — earth systems: practice check 49 — the reliable next step is

Tap A, B, C or D.

Answer: D) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

17. Grade 8 science — earth systems: practice check 50 — the reliable next step is

Tap A, B, C or D.

Answer: B) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

18. Grade 8 science — earth systems: practice check 51 — the reliable next step is

Tap A, B, C or D.

Answer: B) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

19. Grade 8 science — earth systems: practice check 52 — the reliable next step is

Tap A, B, C or D.

Answer: B) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

20. Grade 8 science — earth systems: practice check 53 — the reliable next step is

Tap A, B, C or D.

Answer: B) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

21. Grade 8 science — earth systems: practice check 54 — the reliable next step is

Tap A, B, C or D.

Answer: A) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

22. Grade 8 science — earth systems: practice check 55 — the reliable next step is

Tap A, B, C or D.

Answer: A) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

23. Grade 8 science — earth systems: practice check 56 — the reliable next step is

Tap A, B, C or D.

Answer: A) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

24. Grade 8 science — earth systems: practice check 57 — the reliable next step is

Tap A, B, C or D.

Answer: A) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

25. Grade 8 science — earth systems: practice check 58 — the reliable next step is

Tap A, B, C or D.

Answer: C) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

26. Grade 8 science — earth systems: practice check 59 — the reliable next step is

Tap A, B, C or D.

Answer: C) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

27. Grade 8 science — earth systems: practice check 60 — the reliable next step is

Tap A, B, C or D.

Answer: D) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

28. Grade 8 science — earth systems: practice check 61 — the reliable next step is

Tap A, B, C or D.

Answer: D) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

29. Grade 8 science — earth systems: practice check 62 — the reliable next step is

Tap A, B, C or D.

Answer: D) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

30. Grade 8 science — earth systems: practice check 63 — the reliable next step is

Tap A, B, C or D.

Answer: D) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

31. Grade 8 science — earth systems: practice check 64 — the reliable next step is

Tap A, B, C or D.

Answer: C) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

32. Grade 8 science — earth systems: practice check 65 — the reliable next step is

Tap A, B, C or D.

Answer: C) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

33. Grade 8 science — earth systems: practice check 66 — the reliable next step is

Tap A, B, C or D.

Answer: C) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

34. Grade 8 science — earth systems: practice check 67 — the reliable next step is

Tap A, B, C or D.

Answer: C) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

35. Grade 8 science — earth systems: practice check 68 — the reliable next step is

Tap A, B, C or D.

Answer: A) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

36. Grade 8 science — earth systems: practice check 69 — the reliable next step is

Tap A, B, C or D.

Answer: A) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

37. Grade 8 science — earth systems: practice check 70 — the reliable next step is

Tap A, B, C or D.

Answer: C) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

38. Grade 8 science — earth systems: practice check 71 — the reliable next step is

Tap A, B, C or D.

Answer: C) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

39. Grade 8 science — earth systems: practice check 72 — the reliable next step is

Tap A, B, C or D.

Answer: C) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

40. Grade 8 science — earth systems: practice check 73 — the reliable next step is

Tap A, B, C or D.

Answer: C) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

41. Grade 8 science — earth systems: practice check 74 — the reliable next step is

Tap A, B, C or D.

Answer: D) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

42. Grade 8 science — earth systems: practice check 75 — the reliable next step is

Tap A, B, C or D.

Answer: D) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

43. Grade 8 science — earth systems: practice check 76 — the reliable next step is

Tap A, B, C or D.

Answer: D) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

44. Grade 8 science — earth systems: practice check 77 — the reliable next step is

Tap A, B, C or D.

Answer: D) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

45. Grade 8 science — earth systems: practice check 78 — the reliable next step is

Tap A, B, C or D.

Answer: B) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

46. Grade 8 science — earth systems: practice check 79 — the reliable next step is

Tap A, B, C or D.

Answer: B) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

47. Grade 8 science — earth systems: practice check 80 — the reliable next step is

Tap A, B, C or D.

Answer: B) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

48. Grade 8 science — earth systems: practice check 81 — the reliable next step is

Tap A, B, C or D.

Answer: B) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

49. Grade 8 science — earth systems: practice check 82 — the reliable next step is

Tap A, B, C or D.

Answer: B) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

50. Grade 8 science — earth systems: practice check 83 — the reliable next step is

Tap A, B, C or D.

Answer: B) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

51. Grade 8 science — earth systems: practice check 84 — the reliable next step is

Tap A, B, C or D.

Answer: A) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

52. Grade 8 science — earth systems: practice check 85 — the reliable next step is

Tap A, B, C or D.

Answer: A) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

53. Grade 8 science — earth systems: practice check 86 — the reliable next step is

Tap A, B, C or D.

Answer: A) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

54. Grade 8 science — genetics: practice check 76 — the reliable next step is

Tap A, B, C or D.

Answer: B) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

55. Grade 8 science — genetics: practice check 77 — the reliable next step is

Tap A, B, C or D.

Answer: B) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

56. Grade 8 science — genetics: practice check 78 — the reliable next step is

Tap A, B, C or D.

Answer: D) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

57. Grade 8 science — genetics: practice check 79 — the reliable next step is

Tap A, B, C or D.

Answer: D) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

58. Grade 8 science — genetics: practice check 80 — the reliable next step is

Tap A, B, C or D.

Answer: D) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

59. Grade 8 science — genetics: practice check 81 — the reliable next step is

Tap A, B, C or D.

Answer: D) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

60. Grade 8 science — genetics: practice check 82 — the reliable next step is

Tap A, B, C or D.

Answer: D) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

61. Grade 8 science — genetics: practice check 83 — the reliable next step is

Tap A, B, C or D.

Answer: D) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

62. Grade 8 science — genetics: practice check 84 — the reliable next step is

Tap A, B, C or D.

Answer: C) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

63. Grade 8 science — genetics: practice check 85 — the reliable next step is

Tap A, B, C or D.

Answer: C) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

64. Grade 8 science — genetics: practice check 86 — the reliable next step is

Tap A, B, C or D.

Answer: C) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

65. Grade 8 science — genetics: practice check 87 — the reliable next step is

Tap A, B, C or D.

Answer: C) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

66. Grade 8 science — genetics: practice check 88 — the reliable next step is

Tap A, B, C or D.

Answer: A) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

67. Grade 8 science — genetics: practice check 89 — the reliable next step is

Tap A, B, C or D.

Answer: A) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

68. Grade 8 science — genetics: practice check 90 — the reliable next step is

Tap A, B, C or D.

Answer: C) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

69. Grade 8 science — genetics: practice check 91 — the reliable next step is

Tap A, B, C or D.

Answer: C) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

70. Grade 8 science — genetics: practice check 92 — the reliable next step is

Tap A, B, C or D.

Answer: C) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

71. Genes are made of

Tap A, B, C or D.

Answer: A) DNA

DNA carries hereditary information.

72. A trait is

Tap A, B, C or D.

Answer: B) a characteristic that can be inherited

Eye color is a classic example.

73. Alleles are

Tap A, B, C or D.

Answer: C) different versions of a gene

You inherit alleles from each parent.

74. In a Punnett square, a capital letter often means

Tap A, B, C or D.

Answer: C) a dominant allele

Dominant traits can show with one copy.

75. A recessive trait shows when

Tap A, B, C or D.

Answer: B) both alleles are recessive

Two lowercase letters, like aa.

76. Genotype is the

Tap A, B, C or D.

Answer: D) allele combination

Phenotype is what you see.

77. Humans typically have how many chromosomes in most body cells?

Tap A, B, C or D.

Answer: A) 46

Gametes have 23.

78. Mitosis produces

Tap A, B, C or D.

Answer: A) two identical body cells

Meiosis makes sex cells.

79. Grade 8 science — genetics: practice check 1 — the reliable next step is

Tap A, B, C or D.

Answer: C) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

80. Grade 8 science — genetics: practice check 2 — the reliable next step is

Tap A, B, C or D.

Answer: C) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

81. Grade 8 science — genetics: practice check 3 — the reliable next step is

Tap A, B, C or D.

Answer: C) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

82. Grade 8 science — genetics: practice check 4 — the reliable next step is

Tap A, B, C or D.

Answer: D) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

83. Grade 8 science — genetics: practice check 5 — the reliable next step is

Tap A, B, C or D.

Answer: D) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

84. Grade 8 science — genetics: practice check 6 — the reliable next step is

Tap A, B, C or D.

Answer: D) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

85. Grade 8 science — genetics: practice check 7 — the reliable next step is

Tap A, B, C or D.

Answer: D) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

86. Grade 8 science — genetics: practice check 8 — the reliable next step is

Tap A, B, C or D.

Answer: B) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

87. Grade 8 science — genetics: practice check 9 — the reliable next step is

Tap A, B, C or D.

Answer: B) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

88. Grade 8 science — genetics: practice check 10 — the reliable next step is

Tap A, B, C or D.

Answer: A) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

89. Grade 8 science — genetics: practice check 11 — the reliable next step is

Tap A, B, C or D.

Answer: A) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

90. Grade 8 science — genetics: practice check 12 — the reliable next step is

Tap A, B, C or D.

Answer: A) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

91. Grade 8 science — genetics: practice check 13 — the reliable next step is

Tap A, B, C or D.

Answer: A) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

92. Grade 8 science — genetics: practice check 14 — the reliable next step is

Tap A, B, C or D.

Answer: B) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

93. Grade 8 science — genetics: practice check 15 — the reliable next step is

Tap A, B, C or D.

Answer: B) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

94. Grade 8 science — genetics: practice check 16 — the reliable next step is

Tap A, B, C or D.

Answer: B) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

95. Grade 8 science — genetics: practice check 17 — the reliable next step is

Tap A, B, C or D.

Answer: B) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

96. Grade 8 science — genetics: practice check 18 — the reliable next step is

Tap A, B, C or D.

Answer: D) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

97. Grade 8 science — genetics: practice check 19 — the reliable next step is

Tap A, B, C or D.

Answer: D) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

98. Grade 8 science — genetics: practice check 20 — the reliable next step is

Tap A, B, C or D.

Answer: C) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

99. Grade 8 science — genetics: practice check 21 — the reliable next step is

Tap A, B, C or D.

Answer: C) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.

100. Grade 8 science — genetics: practice check 22 — the reliable next step is

Tap A, B, C or D.

Answer: C) try the item, then read the tip

Original GKSchools practice — not a state exam leak. Come back tomorrow; order rotates.