Across
- 1. fuels – fuels like coal, oil, and gas used for energy
- 3. – the natural home of an animal
- 5. activities – things people do that affect the Earth (suffix: -ity)
- 6. – harmful things added to air, land, or water (suffix: -tion)
- 8. – related to ice or glaciers
- 9. sheet – a very thick layer of ice covering a large area
- 10. – plants and animals living together in one place
- 11. levels – how high the ocean water is
- 13. – ways people travel (prefix: trans-)
- 15. – water that is not salty (prefix: fresh)
- 16. gases – gases that trap heat in Earth’s air
Down
- 2. – people who study and learn about the world (suffix: -ist)
- 4. – people who illegally hunt animals (suffix: -er)
- 7. – the usual weather in a place over a long time
- 8. warming – when Earth’s temperature slowly increases
- 12. – to become different
- 14. – the layer of air around Earth