1. What is meant by conservation of energy in environmental science?
A) Producing more electricity
B) Reducing energy wastage and using energy efficiently
C) Burning more fossil fuels
D) Increasing energy prices
Answer: B
2. Which of the following is a non-renewable energy source?
A) Solar energy
B) Wind energy
C) Coal
D) Hydropower
Answer: C
3. Which appliance consumes the least electricity?
A) Incandescent bulb
B) LED bulb
C) Electric heater
D) Air conditioner
Answer: B
4. Turning off lights when not in use helps in:
A) Increasing pollution
B) Saving energy
C) Increasing electricity bills
D) Reducing oxygen levels
Answer: B
5. Energy-efficient appliances usually have:
A) Energy Star rating
B) Higher noise
C) More heat emission
D) Larger size
Answer: A
6. Which sector consumes the most energy globally?
A) Agriculture
B) Transportation
C) Residential
D) Industrial
Answer: D
7. Carpooling mainly helps in:
A) Increasing traffic
B) Saving fuel
C) Using more diesel
D) Wasting time
Answer: B
8. The law of conservation of energy states that energy:
A) Can be destroyed
B) Can be created
C) Cannot be created or destroyed
D) Is unlimited
Answer: C
9. Solar panels convert sunlight into:
A) Heat only
B) Electricity
C) Coal
D) Gas
Answer: B
10. Which fuel is considered cleaner for cooking?
A) Wood
B) Coal
C) LPG
D) Kerosene
Answer: C
11. Insulating homes helps to:
A) Increase heat loss
B) Reduce energy consumption
C) Increase air pollution
D) Increase noise
Answer: B
12. Using public transport reduces:
A) Fuel consumption
B) Population
C) Rainfall
D) Road size
Answer: A
13. Which of the following is a renewable source?
A) Petroleum
B) Natural gas
C) Wind
D) Diesel
Answer: C
14. Switching off standby mode of electronics helps in:
A) Increasing phantom load
B) Saving electricity
C) Increasing voltage
D) Producing more heat
Answer: B
15. Energy conservation reduces:
A) Greenhouse gas emissions
B) Sunlight
C) Water levels
D) Soil fertility
Answer: A
16. Hydroelectric power uses energy from:
A) Wind
B) Flowing water
C) Coal
D) Biomass
Answer: B
17. Which practice improves fuel efficiency in vehicles?
A) Rapid acceleration
B) Regular maintenance
C) Overloading
D) Idling engine
Answer: B
18. Compact Fluorescent Lamps (CFLs) use:
A) More energy than LEDs
B) Less energy than incandescent bulbs
C) No electricity
D) Coal directly
Answer: B
19. Biomass energy comes from:
A) Fossil fuels
B) Living or recently living organisms
C) Uranium
D) Water currents
Answer: B
20. Which gas emission is reduced by conserving energy?
A) Oxygen
B) Nitrogen
C) Carbon dioxide
D) Helium
Answer: C
21. Energy audits are conducted to:
A) Increase bills
B) Identify energy saving opportunities
C) Waste resources
D) Close industries
Answer: B
22. Geothermal energy is obtained from:
A) Ocean waves
B) Earth’s internal heat
C) Sunlight
D) Wind currents
Answer: B
23. Using bicycles instead of cars helps in:
A) Increasing pollution
B) Saving fossil fuels
C) Increasing fuel cost
D) Causing smog
Answer: B
24. Smart grids help in:
A) Wasting electricity
B) Efficient energy distribution
C) Increasing blackouts
D) Producing coal
Answer: B
25. Which of the following conserves electricity at home?
A) Leaving devices plugged in
B) Using natural daylight
C) Keeping AC at lowest temperature
D) Running empty washing machine
Answer: B
26. Energy conservation contributes to:
A) Sustainable development
B) Deforestation
C) Soil erosion
D) Acid rain increase
Answer: A
27. Wind turbines generate electricity using:
A) Solar heat
B) Moving air
C) Fossil fuels
D) Biomass
Answer: B
28. One advantage of renewable energy is that it:
A) Is exhaustible
B) Produces high pollution
C) Is naturally replenished
D) Causes oil spills
Answer: C
29. Peak load management helps to:
A) Reduce electricity demand during peak hours
B) Increase power cuts
C) Burn more fuel
D) Waste energy
Answer: A
30. The main goal of energy conservation is to:
A) Increase consumption
B) Protect natural resources
C) Increase fossil fuel use
D) Reduce renewable sources
Answer: B