Across
- 4. noun a flat piece of glass that catches the sun's energy
- 7. noun paper and other rubbish on the ground
- 8. verb to make a place clean and without litter and pollution
- 10. noun a way of making electricity from, for example wind,sun or water power
- 12. noun a long, thick piece of wood you use to hold up a roof
- 13. example Earth or Mars
- 14. noun soft, wet earth
- 16. noun a place for people to leave rubbish
- 17. noun the world around us
Down
- 1. noun a window in the roof to let light in
- 2. noun the energy we use to make machines work
- 3. noun materials we can burn to make electricity, for example coal and oil
- 5. noun the animals and birds living in a place
- 6. noun a very large, round rock in space that goes around the sun,
- 9. noun something that makes water, air or land dirty
- 11. verb to hurt something or do something bad to it
- 15. noun a place where fresh water comes out of the ground