Across
- 4. energy where heat that comes from within the Earth
- 8. a power station that uses running water to generate electricity
- 9. to save or use less
- 10. energy from the Sun
- 12. a moving object that has movement energy
- 13. tiny particles that make up matter
- 14. fountain of boiling water and steam from the Earth's surface
Down
- 1. alternative source of energy made from living matter
- 2. a large wall that holds back running water
- 3. will not last forever
- 5. renewable, limited, reservoir, solar, geothermal, geyser, conserve, biofuels, dam, kinetic, nuclear, atoms
- 6. natural or man-made place where water is collected and stored
- 7. energy is stored in the centre of the atom
- 11. can be replenished