Across
- 3. The average weather for an area over a period of time.
- 4. Has units equal to Celsius degrees where 0° is absolute zero.
- 7. A cold air mass is trapped below a warmer air mass.
- 10. Fast flowing air currents high in the atmosphere.
- 11. Front, A zone where two cold air masses push up a warmer air mass.
- 13. The process by which water changes from a liquid to a gas.
- 14. A major greenhouse gas. A result of decomposition and digestion.
- 15. A large body of air with a roughly uniform moisture content and temperature.
- 18. Rain or snow that falls from a cloud but evaporates before it hits the ground.
- 21. Replanting forests on land once converted to other uses.
- 22. When plants convert carbon dioxide into food and oxygen.
Down
- 1. Material from decayed plants and animals, naturally converted into fuel.
- 2. When water leaves the ocean, rains onto land and flows back to the ocean.
- 5. A section of ice from a glacier, each layer showing a historic climate pattern.
- 6. very high energy radiation, usually absorbed by the upper atmosphere.
- 8. Where a warm and a cold air mass collide and neither one moves.
- 9. The cutting down or burning of forest without replacing it.
- 12. A prolonged period of excessive heat, often with excessive humidity.
- 16. The distance north or south of the equator, measured in degrees.
- 17. Gas or liquid fuel made from plant material.
- 19. Gas, Underground deposits of gases containing methane and propane or butane.
- 20. The trapping of solar energy as heat in the atmosphere.