T4 · W6 · 2026
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Secondary 1 · Term 4 · Week 6

Renewable Energy
Interactive Exercises

Science — Renewable Energy Sources
20 questions · self-marked
🌱 Renewable Energy
🌱
Science

Renewable Energy Sources

What is Renewable Energy?
Renewable energy comes from natural sources that are constantly replenished and will not run out.
S1
Which of these is the BEST definition of renewable energy?
2 marks
A
Energy that comes from burning wood and coal
B
Energy from natural sources that can be replenished and will not run out
C
Energy that is only available during the daytime
D
Energy stored in batteries for later use
S2
Which of these is NOT a renewable energy source?
1 mark
A
Solar power
B
Coal
C
Wind power
D
Hydroelectric power
Section A — Solar Energy
Solar panels convert sunlight directly into electricity using photovoltaic cells.
Solar Panel Sunlight → Electricity
S3
What do solar panels convert sunlight into?
1 mark
S4
What is ONE advantage of solar energy over fossil fuels?
2 marks
A
It produces greenhouse gases when generating electricity
B
It does not produce air pollution or greenhouse gases during operation
C
It only works at night
D
It requires constant refueling
Section B — Wind Energy
Wind turbines convert the kinetic energy of moving air into electrical energy.
Nacelle
S5
What type of energy does a wind turbine convert into electrical energy?
1 mark
A
Chemical energy
B
Kinetic energy
C
Potential energy
D
Thermal energy
S6
A modern wind turbine can generate enough electricity to power approximately how many homes? (Select the most reasonable answer)
2 marks
A
1 home
B
10 homes
C
100-1500 homes
D
An entire city
Section C — Hydroelectric Energy
Hydroelectric power uses the energy of flowing or falling water to generate electricity.
TURBINE TURBINE TURBINE GEN Dam Water flow
S7
How does a hydroelectric power station generate electricity?
2 marks
A
By burning water to create steam
B
By using the kinetic energy of flowing water to spin turbines connected to generators
C
By converting water directly into electricity through chemical reactions
D
By storing water in batteries
S8
What is ONE environmental benefit of hydroelectric power?
1 mark
A
It produces large amounts of carbon dioxide
B
It produces no greenhouse gas emissions during operation
C
It requires constant fueling with coal
D
It creates nuclear waste
Section D — Benefits of Renewable Energy
Renewable energy provides many advantages over fossil fuels.
✓
Low
emissions
∞
Won't run
out
$
Lower
costs
S9
Which are benefits of renewable energy? (Select ALL correct answers)
2 marks
A
Reduces greenhouse gas emissions
B
Will not run out
C
Improves air quality
D
Produces radioactive waste
S10
Why is reducing dependence on fossil fuels important for the environment?
2 marks
A
Fossil fuels are unlimited and will never run out
B
Burning fossil fuels releases carbon dioxide which contributes to climate change
C
Fossil fuels are too expensive to extract
D
Fossil fuels cannot be used to generate electricity
Section E — Challenges & Society's Role
While renewable energy has many benefits, there are also challenges to overcome.
S11
Which is a challenge of solar energy?
2 marks
A
It only works at night
B
It produces no electricity on cloudy days
C
Electricity generation depends on weather and daylight availability
D
It causes more pollution than coal
S12
What is ONE way individuals can support renewable energy?
1 mark
A
Use more fossil fuel-powered devices
B
Install solar panels on their homes (where possible)
C
Leave all lights on all the time
D
Waste more energy
S13
Which country currently generates the MOST electricity from renewable sources globally?
2 marks
A
United States
B
China
C
Germany
D
India
S14 ⭐
Challenge: A small town uses coal to generate 50 MW of electricity. If they switch to wind power with turbines that each produce 2 MW, how many wind turbines would they need to generate the same amount of electricity?
3 marks
turbines
S15 ⭐
Extension: Name TWO environmental problems that renewable energy helps solve.
2 marks
A
Climate change
B
Air pollution
C
Water scarcity
D
Soil erosion
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