Back to: PRIMARY SEVEN P7 SCIENCE TOPICAL QUESTIONS AND ANSWERS
Water as an energy resource How is water used as an energy resource?
Water as an energy resource.
Qn. How is water used as an energy resource?
- Fast running water helps to generate hydro electricity.
- Steam from hot springs is used to generate geothermal electricity.
- Tides are used to generate tidal electricity.
Qn. Give the examples of useful energy resources got from water. - Hydro electricity.
- Geothermal electricity
- Tidal electricity
Qn. What is a tide? - A tide is a regular rise and fall of water in the sea or ocean.
Qn. What causes a tide? - A tide is caused by the attraction of the moon and earth.
Wind as energy resource Qn. What is air? - Air is a mixture of gases
Qn. What is wind? - Wind is air in motion or moving air.
Note: - Wind possesses kinetic energy that makes things move.
Qn. State the ways how wind is used as an energy resource. - Wind is used in winnowing.
- Wind is used to sail boats.
- Wind is used to turn wind mills.
- Wind is used to fly kites.
- Wind helps to dry washed clothes.
- Wind helps in seed dispersal.
Qn. State the dangers of wind.
Strong wind destroys crops.
Strong wind destroys buildings. - Strong wind capsizes boats.
Qn. How does wind help to dry clothes? - By speeding up the evaporation process.
A diagram of a windmill.

Qn. Give the uses of a windmill
- A wind mill is used to generate electricity.
- A wind mill is used to pump water from underground.
- A wind mill is used to grind grains.
Qn. How is wind formed? - Wind is formed when air in a certain area is heated faster than air in another area.
Qn. Write down different ways of conserving renewable resources. - Afforastation.
- Re-afforestation
- Agro forestry
- Using energy saving stoves.
- Using other alternative sources of energy e.g. biogas instead of wood fuel
- Proper feeding of animals.
- Treating animals when they are sick
- Gazetting animals in games reserves
- Banning illegal hunting of animals
Energy resources from fossil fuels
Qn. What are fossils? - Fossils are remains of plants and animals that lived thousands of years ago.
Qn. What are fossil fuels? - Fossil fuels are fuels that were formed from the remains of plants and animals that lived thousands of years ago.
Qn. Give the examples of fossil fuels. - Petroleum
- Coal
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