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1. What is the main source of energy for life on Earth?
A. Moon
B. Sun
C. Stars
D. Wind
2. Which gas makes up the largest portion of air?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Argon
3. What percentage of air is made up of oxygen?
A. 78%
B. 21%
C. 1%
D. 50%
4. What is the term for moving air?
A. Wind
B. Storm
C. Breeze
D. Humidity
5. What is the process of collecting and storing rainwater called?
A. Water conservation
B. Irrigation
C. Rainwater harvesting
D. Evaporation
6. Which of the following is NOT a renewable resource?
A. Solar energy
B. Wind energy
C. Coal
D. Water
7. What is the major component of fossil fuels?
A. Oxygen
B. Carbon
C. Hydrogen
D. Nitrogen
8. Which of the following helps prevent soil erosion?
A. Cutting down trees
B. Plant roots
C. Plastic bags
D. Rocks
9. Wind energy is mainly used for:
A. Cooking
B. Running vehicles
C. Generating electricity
D. Watering plants
10. What is the percentage of nitrogen in the air?
A. 21%
B. 78%
C. 50%
D. 10%
11. The energy from the Sun can be used directly for:
A. Cooling water
B. Heating water
C. Running vehicles
D. Cleaning water
12. What do solar panels do?
A. Produce water
B. Generate electricity
C. Clean the air
D. Grow plants
13. Which of the following is a fossil fuel?
A. Wind
B. Water
C. Coal
D. Sunlight
14. What percentage of the Earth's surface is covered with water?
A. 50%
B. 30%
C. 90%
D. 70%
15. Which is an example of a non-renewable resource?
A. Forest
B. Water
C. Coal
D. Wind
16. What is one way to reduce the use of fossil fuels?
A. Walk or cycle
B. Burn more coal
C. Use more plastic
D. Increase deforestation
17. What does the term "fossil fuel" refer to?
A. Energy from fossils
B. Energy from the sun
C. Fuel formed from the remains of plants and animals
D. Fuel that replenishes naturally
18. How do forests contribute to the prevention of soil erosion?
A. By providing habitat for wildlife
B. Through the decay of leaves enriching the soil
C. By holding the soil in place with plant roots
D. By reducing rainfall
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