Grade 7 - Science practice paper 2
1. Which organelle is known as the "powerhouse of the cell"?
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A) Nucleus
B) Ribosome
C) Mitochondria
D) Endoplasmic Reticulum
Answer: C) Mitochondria
2. What is the hardest natural substance on Earth?
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A) Quartz
B) Diamond
C) Gold
D) Graphite
Answer: B) Diamond
3. What is the chemical formula for water?
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A) H2O
B) CO2
C) NaCl
D) O2
Answer: A) H2O
4. Which planet has the most moons?
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A) Mars
B) Jupiter
C) Saturn
D) Neptune
Answer: B) Jupiter
5. What is the main source of energy for the Earth?
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A) Wind
B) Sun
C) Water
D) Fossil Fuels
Answer: B) Sun
6. What type of blood vessel carries blood away from the heart?
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A) Artery
B) Vein
C) Capillary
D) Nerve
Answer: A) Artery
7. Which gas is most responsible for global warming?
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A) Oxygen
B) Carbon Dioxide
C) Hydrogen
D) Helium
Answer: B) Carbon Dioxide
8. What is the pH of a neutral substance?
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A) 0
B) 7
C) 14
D) 10
Answer: B) 7
9. What do we call the process by which rocks are broken down into smaller pieces?
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A) Erosion
B) Weathering
C) Deposition
D) Sedimentation
Answer: B) Weathering
10. What is the name of the largest planet in our solar system?
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A) Earth
B) Jupiter
C) Saturn
D) Uranus
Answer: B) Jupiter
11. What force pulls objects toward the center of the Earth?
●​ A) Friction
●​ B) Gravity
●​ C) Magnetism
●​ D) Buoyancy
Answer: B) Gravity
12. What are vertebrates?
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A) Animals with backbones
B) Animals without backbones
C) Plants with vascular systems
D) Animals with exoskeletons
Answer: A) Animals with backbones
13. Which organ in the human body controls all activities?
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A) Heart
B) Brain
C) Liver
D) Stomach
Answer: B) Brain
14. Which organ in plants absorbs water and minerals?
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A) Leaves
B) Roots
C) Stem
D) Flower
Answer: B) Roots
15. What are compounds made of?
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A) Only metals
B) Only gases
C) Two or more elements chemically combined
D) Pure elements
Answer: C) Two or more elements chemically combined
16. What is the main function of the xylem in plants?
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A) Transport water
B) Transport food
C) Store energy
D) Reproduce
Answer: A) Transport water
17. What is the symbol for iron in the periodic table?
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A) Fe
B) Ir
C) I
D) In
Answer: A) Fe
18. What causes tides in the oceans?
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A) Wind
B) Earth's Rotation
C) Gravitational pull of the Moon
D) Sunlight
Answer: C) Gravitational pull of the Moon
19. What is the measure of the amount of matter in an object?
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A) Volume
B) Density
C) Mass
D) Weight
Answer: C) Mass
20. Which component of blood helps in clotting?
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A) White Blood Cells
B) Red Blood Cells
C) Platelets
D) Plasma
Answer: C) Platelets