Across
- 4. the level of the sea's surface.
- 8. physical quantity that expresses hot and cold measured by a thermometer.
- 10. natural fuel such as coal or gas, formed in the geological past from the remains of living organisms.
- 12. gas that contributes to the greenhouse effect by absorbing carbon dioxide.
- 13. gas produced by burning carbon
- 14. physical harm caused to something in such a way as to impair its value, usefulness, or normal function.
- 16. large, destructive fire that spreads quickly over woodland or brush.
Down
- 1. the weather conditions prevailing in an area in general or over a long period.
- 2. make or become warm.
- 3. the covering or submerging of normally dry land with a large amount of water.
- 5. the sudden or violent start of something unwelcome, such as war, disease, etc.
- 6. becoming liquefied by heat.
- 7. prolonged period of abnormally low rainfall, leading to a shortage of water.
- 9. a substance or matter having no fixed shape (unlike a solid) and no fixed volume (unlike a liquid).
- 11. the production and discharge of something, especially gas or radiation.
- 15. power derived from the utilization of physical or chemical resources, especially to provide light and heat or to work machines.