Renewable energy: Sun and wind
Answers are for parents and teachers.
1
Look for a solar water heater or solar panel on a roof near you. Draw it and write what energy change it makes.
Answers differ. Water heater: light to heat. Solar panel: light to electrical.
2
A windmill crushes 9 kg of grain an hour. How many kg in 4 hours?
9 × 4 = 36 kg.
3
Draw the energy chain for a wind turbine: Sun, wind, blades, generator, home.
Boxes in order with arrows.
4
List three renewable and three nonrenewable energy sources.
Renewable: sunlight, wind, moving water. Nonrenewable: coal, oil, natural gas.
5
Explain to someone at home why a wind farm is built near the sea or on a plain.
The wind is strong and steady there, so the blades turn more and more electricity is made.