For students of Classes 6 to 8, I have presented below 100 quiz questions. These 100 science quiz questions for Class 6 to 8 will help you learn some new and frequently asked questions in exams.
Each quiz question has four answer options. Only one option is the correct answer. All the correct answers are given at the end of the quiz after the 100th question.
Let's start the quiz.
100 Science Quiz Questions for Class 6 to 8
Question number 1 to 20 are given below:
Question 1: What is the center of our solar system?
A) Earth
B) Mars
C) Sun
D) Moon
Question 2: Which gas do plants absorb from the atmosphere for photosynthesis?
A) Oxygen
B) Nitrogen
C) Carbon dioxide
D) Hydrogen
Question 3: What is the process of plants making their own food using sunlight?
A) Respiration
B) Digestion
C) Photosynthesis
D) Germination
Question 4: Which planet is known as the Red Planet?
A) Venus
B) Mars
C) Jupiter
D) Saturn
Question 5: What is the hardest natural substance on Earth?
A) Steel
B) Gold
C) Diamond
D) Iron
Question 6: Which force pulls objects towards the center of the Earth?
A) Gravity
B) Magnetism
C) Friction
D) Tension
Question 7: What gas do humans breathe out after inhaling oxygen?
A) Oxygen
B) Nitrogen
C) Carbon dioxide
D) Hydrogen
Question 8: Which part of a plant absorbs water and nutrients from the soil?
A) Stem
B) Leaf
C) Root
D) Flower
Question 9: What is the process of the water cycle where water droplets form on a cold surface?
A) Evaporation
B) Condensation
C) Precipitation
D) Sublimation
Question 10: Which of the following is not a type of simple machine?
A) Lever
B) Pulley
C) Battery
D) Inclined plane
Question 11: What gas do we need for combustion to occur?
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Hydrogen
Question 12: What is the chemical symbol for water?
A) O2
B) CO2
C) H2O
D) N2
Question 13: Which of the following is NOT a mammal?
A) Dolphin
B) Penguin
C) Kangaroo
D) Elephant
Question 14: What is the process by which plants make seeds?
A) Pollination
B) Germination
C) Fertilization
D) Photosynthesis
Question 15: Which layer of the Earth is made up of solid rock and extends beneath the Earth's surface?
A) Crust
B) Mantle
C) Core
D) Atmosphere
Question 16: What is the primary function of the heart in the human body?
A) Pump blood
B) Digest food
C) Filter air
D) Store energy
Question 17: Which planet is known as the "Morning Star" or "Evening Star" because it is often visible in the morning or evening sky?
A) Venus
B) Mars
C) Jupiter
D) Mercury
Question 18: Which gas do plants release during photosynthesis?
A) Oxygen
B) Nitrogen
C) Carbon dioxide
D) Hydrogen
Question 19: What force keeps the planets in our solar system orbiting the Sun?
A) Magnetism
B) Friction
C) Gravity
D) Centrifugal force
Question 20: What is the process of the Earth's rotation causing day and night?
A) Revolution
B) Orbit
C) Rotation
D) Eclipse
Correct Answers for Quiz Questions for Class 6 to 8 (Question number 1 to 20):
- C) Sun
- C) Carbon dioxide
- C) Photosynthesis
- B) Mars
- C) Diamond
- A) Gravity
- C) Carbon dioxide
- C) Root
- B) Condensation
- C) Battery
- A) Oxygen
- C) H2O
- B) Penguin
- C) Fertilization
- A) Crust
- A) Pump blood
- A) Venus
- A) Oxygen
- C) Gravity
- C) Rotation
Question number 21 to 40 are given below:
Question 21: What is the process by which plants and animals obtain energy from food?
A) Digestion
B) Respiration
C) Excretion
D) Circulation
Question 22: Which gas do humans inhale to support respiration?
A) Carbon dioxide
B) Oxygen
C) Nitrogen
D) Hydrogen
Question 23: What is the smallest unit of matter that retains the properties of an element?
A) Cell
B) Molecule
C) Atom
D) Tissue
Question 24: What gas do fire extinguishers often use to put out fires?
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Hydrogen
Question 25: Which of these animals is a cold-blooded vertebrate?
A) Dog
B) Fish
C) Owl
D) Hamster
Question 26: What do you call the process of a liquid turning into a gas at its boiling point?
A) Melting
B) Evaporation
C) Condensation
D) Sublimation
Question 27: What is the study of fossils called?
A) Geology
B) Meteorology
C) Paleontology
D) Botany
Question 28: What is the process of water vapor turning into tiny water droplets in the air?
A) Evaporation
B) Condensation
C) Precipitation
D) Filtration
Question 29: Which planet is known as the "Gas Giant" because it is composed mainly of gases like hydrogen and helium?
A) Mars
B) Jupiter
C) Saturn
D) Uranus
Question 30: Which part of the plant helps in the process of transpiration?
A) Stem
B) Leaf
C) Root
D) Flower
Question 31: What is the Earth's natural satellite?
A) Mars
B) Sun
C) Moon
D) Jupiter
Question 32: Which gas is responsible for the green color of leaves?
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Chlorophyll
Question 33: What is the process of a caterpillar turning into a butterfly?
A) Metamorphosis
B) Respiration
C) Germination
D) Fertilization
Question 34: Which gas do we exhale when we breathe out?
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Hydrogen
Question 35: What is the layer of the Earth's atmosphere where weather occurs?
A) Stratosphere
B) Troposphere
C) Exosphere
D) Mesosphere
Question 36: Which force opposes the motion of an object through a fluid (like air or water)?
A) Magnetism
B) Friction
C) Gravity
D) Inertia
Question 37: What is the unit of measurement for temperature in the Celsius scale?
A) Kelvin
B) Fahrenheit
C) Joule
D) Celsius
Question 38: Which sense organ is responsible for our sense of taste?
A) Skin
B) Eye
C) Ear
D) Tongue
Question 39: What is the process of a plant shedding its leaves during the autumn season?
A) Transpiration
B) Hibernation
C) Deciduous
D) Conduction
Question 40: What is the process of a solid turning directly into a gas without becoming a liquid first?
A) Evaporation
B) Condensation
C) Sublimation
D) Precipitation
Correct Answers for Quiz Questions for Class 6 to 8 (Question number 21 to 40):
21. B) Respiration
22. B) Oxygen
23. C) Atom
24. B) Carbon dioxide
25. B) Fish
26. B) Evaporation
27. C) Paleontology
28. B) Condensation
29. B) Jupiter
30. B) Leaf
31. C) Moon
32. D) Chlorophyll
33. A) Metamorphosis
34. B) Carbon dioxide
35. B) Troposphere
36. B) Friction
37. D) Celsius
38. D) Tongue
39. C) Deciduous
40. C) Sublimation
Question number 41 to 60 are given below:
Question 41: Which planet is known for its beautiful rings made of ice and rock?
A) Earth
B) Mars
C) Saturn
D) Uranus
Question 42: What is the process of plants losing water vapor through tiny openings in their leaves?
A) Condensation
B) Transpiration
C) Precipitation
D) Evaporation
Question 43: What gas is essential for all living organisms and makes up approximately 78% of Earth's atmosphere?
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Hydrogen
Question 44: Which planet is known as the "Blue Planet" due to its abundance of water?
A) Venus
B) Earth
C) Neptune
D) Pluto
Question 45: What is the process of converting solid directly into vapor without passing through the liquid state?
A) Condensation
B) Melting
C) Sublimation
D) Freezing
Question 46: What part of the plant helps in the process of photosynthesis?
A) Root
B) Stem
C) Leaf
D) Flower
Question 47: What is the force that opposes the motion of an object when it slides over a surface?
A) Magnetism
B) Friction
C) Gravity
D) Buoyancy
Question 48: What is the main function of the respiratory system in humans?
A) Pump blood
B) Filter air
C) Exchange oxygen and carbon dioxide
D) Digest food
Question 49: Which gas is used in balloons to make them float?
A) Oxygen
B) Nitrogen
C) Helium
D) Carbon dioxide
Question 50: What is the Earth's primary source of light and heat?
A) Moon
B) Stars
C) Sun
D) Comet
Question 51: Which gas is released when baking soda reacts with vinegar?
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Hydrogen
Question 52: What is the process by which plants and animals release stored energy?
A) Respiration
B) Photosynthesis
C) Digestion
D) Germination
Question 53: Which of the following is NOT a renewable source of energy?
A) Solar power
B) Wind power
C) Fossil fuels
D) Hydroelectric power
Question 54: Which organ in the human body is responsible for filtering waste from the blood?
A) Liver
B) Kidney
C) Lungs
D) Stomach
Question 55: What is the process of changing a liquid into a solid by lowering its temperature?
A) Evaporation
B) Condensation
C) Freezing
D) Boiling
Question 56: What gas do plants give off during the night?
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Hydrogen
Question 57: What is the term for the protective layer that covers and supports the cells of plants?
A) Skin
B) Bark
C) Tissue
D) Membrane
Question 58: Which celestial body is closest to Earth in our solar system?
A) Mars
B) Venus
C) Jupiter
D) Saturn
Question 59: What is the process by which an organism grows and develops?
A) Photosynthesis
B) Germination
C) Growth
D) Metamorphosis
Question 60: What is the outermost layer of the Earth's atmosphere, where the International Space Station orbits?
A) Troposphere
B) Mesosphere
C) Exosphere
D) Stratosphere
Correct Answers for Quiz Questions for Class 6 to 8 (Question number 21 to 40):
41: A) Thermal energy
42: D) Helium
43: C) Nitrogen
44: B) Earth
45: C) Sublimation
46: C) Leaf
47: D) Friction
48: C) Exchange oxygen and carbon dioxide
49: C) Helium
50: C) Sun
51: B) Carbon dioxide
52: A) Respiration
53: C) Fossil fuels
54: B) Kidney
55: C) Freezing
56: B) Carbon dioxide
57: B) Bark
58: B) Venus
59: C) Growth
60: C) Exosphere
Question number 61 to 80 are given below:
Question 61: What type of energy does the Sun primarily provide to Earth?
A) Thermal energy
B) Kinetic energy
C) Sound energy
D) Magnetic energy
Question 62: Which gas is essential for combustion to occur?
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Helium
Question 63: What is the process of a liquid changing into a gas at the surface called?
A) Melting
B) Evaporation
C) Condensation
D) Sublimation
Question 64: What is the process of breaking down food into simpler substances in the body?
A) Circulation
B) Respiration
C) Digestion
D) Photosynthesis
Question 65: Which gas is responsible for the greenhouse effect and trapping heat in Earth's atmosphere?
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Methane
Question 66: What is the term for the force that opposes the motion of objects through a fluid (like air or water)?
A) Magnetism
B) Gravity
C) Inertia
D) Friction
Question 67: Which planet is known for its beautiful, prominent rings made of ice and dust?
A) Mars
B) Saturn
C) Neptune
D) Uranus
Question 68: What is the process of the Moon passing between the Sun and Earth, casting a shadow on Earth's surface?
A) Solar eclipse
B) Lunar eclipse
C) Comet
D) Meteor shower
Question 69: What is the largest planet in our solar system?
A) Mars
B) Venus
C) Jupiter
D) Saturn
Question 70: Which gas do humans inhale to support respiration?
A) Carbon dioxide
B) Oxygen
C) Nitrogen
D) Hydrogen
Question 71: What is the term for the process of plants and trees shedding their leaves in the fall?
A) Hibernation
B) Migration
C) Deciduous
D) Evergreen
Question 72: What is the process of water droplets falling from the atmosphere to the Earth's surface?
A) Evaporation
B) Condensation
C) Precipitation
D) Filtration
Question 73: Which gas is responsible for the Earth's protective ozone layer?
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Ozone (O3)
Question 74: What is the main function of the circulatory system in humans?
A) Pump blood
B) Filter air
C) Digest food
D) Remove waste
Question 75: What is the process of a solid turning directly into a gas without becoming a liquid first?
A) Melting
B) Evaporation
C) Sublimation
D) Condensation
Question 76: What is the term for the movement of water through the ground to underground reservoirs?
A) Evaporation
B) Runoff
C) Infiltration
D) Precipitation
Question 77: Which planet is known as the "Red Planet" due to its reddish appearance?
A) Earth
B) Mars
C) Venus
D) Jupiter
Question 78: What is the unit of measurement for the force of gravity?
A) Newton
B) Joule
C) Watt
D) Volt
Question 79: What is the process of the Earth orbiting around the Sun?
A) Revolution
B) Rotation
C) Acceleration
D) Oscillation
Question 80: What is the substance that makes up the majority of the Earth's crust?
A) Water
B) Air
C) Rock
D) Sand
Correct Answers for Quiz Questions for Class 6 to 8 (Questions number 61 to 80):
61. B) Photosynthesis
62. D) Helium
63. B) Evaporation
64. C) Digestion
65. B) Carbon dioxide
66. D) Inertia
67. B) Saturn
68. A) Solar eclipse
69. C) Jupiter
70. B) Oxygen
71. C) Deciduous
72. C) Precipitation
73. D) Ozone (O3)
74. A) Pump blood
75. C) Sublimation
76. C) Infiltration
77. B) Mars
78. A) Newton
79. A) Revolution
80. C) Rock
Question number 81 to 100 are given below:
Question 81: What is the process by which plants and some bacteria convert sunlight into energy?
A) Respiration
B) Photosynthesis
C) Digestion
D) Circulation
Question 82: Which gas is commonly used in balloons to make them float?
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Helium
Question 83: What is the main component of our atmosphere?
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Hydrogen
Question 84: Which planet is known for its prominent and colorful storms, including the Great Red Spot?
A) Mars
B) Saturn
C) Jupiter
D) Neptune
Question 85: What is the process of water vapor turning into liquid droplets, forming clouds?
A) Evaporation
B) Precipitation
C) Condensation
D) Filtration
Question 86: What part of the plant is responsible for anchoring it in the soil and absorbing water and nutrients?
A) Stem
B) Leaf
C) Root
D) Flower
Question 87: What force keeps an object in motion unless acted upon by an external force?
A) Magnetism
B) Friction
C) Gravity
D) Inertia
Question 88: What is the primary function of the skeletal system in the human body?
A) Pump blood
B) Produce hormones
C) Provide structure and support
D) Digest food
Question 89: Which gas is used by plants during photosynthesis to produce food?
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Hydrogen
Question 90: What is the process of a gas turning directly into a solid without becoming a liquid first?
A) Condensation
B) Freezing
C) Sublimation
D) Evaporation
Question 91: What is the Earth's natural satellite?
A) Mars
B) Sun
C) Moon
D) Jupiter
Question 92: Which gas is responsible for the brown coloration of the Earth's troposphere in polluted areas?
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Sulfur dioxide
Question 93: What is the term for the protective layer of cells covering the outer surface of leaves?
A) Bark
B) Epidermis
C) Stomata
D) Cortex
Question 94: Which planet is often referred to as the "evening star" when visible after sunset?
A) Venus
B) Mars
C) Jupiter
D) Mercury
Question 95: What is the process of changing a gas directly into a solid without passing through the liquid state?
A) Evaporation
B) Condensation
C) Sublimation
D) Freezing
Question 96: What is the primary source of energy for most living organisms on Earth?
A) Wind
B) Fossil fuels
C) Solar radiation (Sun)
D) Geothermal heat
Question 97: What is the unit of measurement for electric current?
A) Volt
B) Ohm
C) Ampere
D) Watt
Question 98: Which sense organ is responsible for our sense of smell?
A) Skin
B) Eye
C) Ear
D) Nose
Question 99: What is the process of the gradual change in the characteristics of a species over time?
A) Metamorphosis
B) Evolution
C) Photosynthesis
D) Germination
Question 100: What is the process of a gas changing back into a liquid when it cools down?
A) Evaporation
B) Condensation
C) Sublimation
D) Boiling
Correct Answers for Quiz Questions for Class 6 to 8 (Questions number 81 to 100):
81. B) Photosynthesis
82. D) Helium
83. C) Nitrogen
84. C) Jupiter
85. C) Condensation
86. C) Root
87. D) Inertia
88. C) Provide structure and support
89. B) Carbon dioxide
90. C) Sublimation
91. C) Moon
92. D) Sulfur dioxide
93. B) Epidermis
94. A) Venus
95. C) Sublimation
96. C) Solar radiation (Sun)
97. C) Ampere
98. D) Nose
99. B) Evolution
100. B) Condensation
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