Across
- 2. condition of the atmosphere in one place during a short period of time
- 3. a periodic reversal of the pattern of ocean currents and water temperatures in the mid-Pacific region
- 6. being in or facing the direction of the wind
- 9. plant life that grows in a certain area if people have not changed the natural environment
- 11. one of two days (about June 21 and December 22) on which the sun's rays strike directly on the
- 13. in astronomy, the Earth's yearly trip around the sun, taking 365ΒΌ days
- 14. an imaginary line that runs through the center of the earth between the North and South Poles
- 16. the average of the daily high temperature and the overnight low temperature; often used for comparison across climate regions
- 19. result of a process by which dry areas develop on the leeward sides of mountain ranges
- 20. the capacity of certain gases in the atmosphere to trap heat, thereby warming the earth
- 21. major type of ecological community defined primarily by distinctive plant and animal groups
Down
- 1. wind in a region that flows in a fairly constant general direction
- 4. continuous daylight, a time when sun is visible at midnight during the summer in either the Arctic or Antarctic Circle
- 5. the resulting deflection of prevailing winds caused by the Earth's rotation
- 7. a frequently windless area near the equator
- 8. cold or warm stream od seawater that flows in the oceans, generally in a circular pattern
- 10. being in or facing the opposite direction of the wind
- 12. weather patterns typical for an area over a long period of time
- 15. of Cancer or the Tropic of Capricorn, marking the beginning of summer or winter
- 17. one of two days (about March 21 and September 23) on which the sun is directly above the Equator, making day and night equal in length
- 18. small area in a desert where water and vegetation are found