Across
- 3. the dangerous warming of the Earth
- 6. animals that hunt and kill other animals for food
- 8. bodies of water that feed into larger bodies of water, such as rivers
- 10. devices that emit a bean of radiation
- 13. a gas that is found normally in the atmosphere and is absorbed by plants
- 14. a period of time when a large area of Earth is covered by glaciers
- 15. a spacecraft that travels around Earth and transmits communication signals
Down
- 1. any substance that provides nourishment when consumed
- 2. the act of removing tress from an area
- 4. Substance in plants such as coffee and tea, when consumed, can make people feel alert
- 5. a brownish, mushy substance made up of dead, decomposing parts of plants and animal waste on a forest floor
- 7. a liquid produced by certain types of plants that is made into rubber
- 9. native to a certain place; having been born in a place
- 11. a boat made of a hollowed tree trunk
- 12. a specific group of plants or animals that shares characteristics