Across
- 4. the process by which a green plant turns water and carbon dioxide into food when the plant is exposed to light
- 5. used to describe a type of animal or plant that has become very rare and that could die out completely
- 7. the act or result of cutting down or burning all the trees in an area
- 10. able to be used without being completely used up or destroyed
- 11. an area of land (such as a marsh or swamp) that is covered with shallow water — usually plural
- 13. a series of activities designed to produce a particular result
- 17. the place or type of place where a plant or animal naturally or normally lives or grows
- 18. a crop (such as tobacco or cotton) that is grown to be sold rather than for use by the farmer
- 19. the gradual destruction of something by natural forces (such as water, wind, or ice) : the process by which something is eroded or worn away
- 21. a tropical forest that receives a lot of rain and that has very tall trees
- 22. a small animal that has six legs and a body formed of three parts and that may have wings
Down
- 1. a device that is used to find direction by means of a needle that always points north
- 2. able to be used without being completely used up or destroyed
- 3. an area of very dry land that is usually covered with sand and is very hot
- 6. all the plants that live in a particular area, time, period, or environment
- 8. used to describe a type of animal or plant that has become very rare and that could die out completly
- 9. the act or result of cutting down or burning all the trees in an area
- 12. a type of animal that feeds milk to its young and that usually has hair or fur covering most of its skin
- 14. land covered with grasses and other soft plants but not with bushes and trees
- 15. the whole mass of air that surrounds the Earth
- 16. the state of being kept from harm, loss, etc. : the state of being protected
- 20. used to describe a type of animal or plant that has become very rare and that could die out completely
