Across
- 2. _______ fuels are formed from the remains of plants and animals which contains energy that can be traced back to the sun
- 4. Our _____ is the main source of energy
- 5. _______ water in rivers, streams and waterfall is a source of energy that do not run out
- 6. _________ energy source can last forever because they can be replenished.
- 10. A dam store a large amount of water which contains a great amount of ___________ potential energy
Down
- 1. We need to _________ energy since it is dependent on limited fossil fuel
- 3. Fossil fuels are _______ in supply and will run out one day
- 7. Solar energy consists of both heat and ________ energy
- 8. _______ is also a source of renewable energy which can spin the blades of a turbine to generate electrical energy
- 9. Fossil fuel like ______, gas and oil contains chemical potential energy in them