Across
- 2. use moving water to create energy
- 4. a place for people to leave rubbish
- 5. the world around us
- 8. a flat piece of glass that catches the sun's energy
- 11. to make a place clean again
- 14. a home which does not harm the environment
- 15. paper and other rubbish on the ground
- 17. soft, wet earth
- 18. the animals and birds living in a place
- 20. a window in the roof to let light in
- 21. to hurt something or do something bad to it
- 22. a very large, round rock in space
Down
- 1. materials we can burn to make energy
- 3. a word machines that scientists invent
- 6. a place where fresh water comes out of the ground
- 7. a long, thick piece of wood used to hold up a roof
- 9. a way of making energy we can reuse
- 10. people grow vegetables in these in cold countries
- 12. the energy that we use to make machines work
- 13. something that makes water, air or land dirty
- 16. what we put litter inside
- 19. a place to go and see animals