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
A town is choosing between a wind farm and a coal power station. Which fact makes the wind farm the renewable option?
2 marks
A
It burns its fuel more cleanly than the coal station does
B
It can store what it makes in batteries for the evening
C
It generates most of its power during the daytime
D
The wind it uses keeps being made by the weather, so no amount of use can exhaust it
S2
Which of these is NOT a renewable energy source?
1 mark
A
Solar power
B
Wind power
C
Coal
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 does not produce air pollution or greenhouse gases during operation
B
It produces greenhouse gases when generating electricity
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
Potential energy
C
Kinetic 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
An entire city
D
100-1500 homes
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 using the kinetic energy of flowing water to spin turbines connected to generators
B
By burning water to create steam
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 requires constant fueling with coal
C
It produces no greenhouse gas emissions during operation
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
Electricity generation depends on weather and daylight availability
B
It produces no electricity on cloudy days
C
It only works at night
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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