Earth

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Across
  1. 1. the part of the earth's atmosphere which extends from the top of the troposphere to about 30 miles above the surface and in which temperature increases gradually to about 32° F and clouds rarely form.
  2. 4. can be defined as an asymmetry in molecular composition or structure between two sides, thus defining a polarity axis along which cellular processes will be differentially regulated.
  3. 6. the sun shines on different latitudes at different angles throughout the year.
  4. 9. is a circle that divides the surface of an object into two equal halves. If you're freezing up there in Iceland, get yourself on down closer to the earth's equator, where it's nice and warm. An equator is an invisible line that divides a globe into two parts, north and south.
  5. 11. is an agreement between parties, creating mutual obligations that are enforceable by law.
  6. 13. a belt of strong upper-level winds lying above regions of subtropical high pressure.
  7. 14. is a layer of Earth's atmosphere that is directly above the mesosphere and below the exosphere.
  8. 15. are the winds in the middle latitudes between 35 and 65 degrees latitude.
  9. 16. to increase in size, number, or importance, or to make something increase in this way: The air in the balloon expands when heated.
  10. 18. is the measure of hotness or coldness expressed in terms of any of several scales, including Fahrenheit and Celsius.
  11. 19. is a layer of Earth's atmosphere. The mesosphere is directly above the stratosphere and below the thermosphere.
  12. 20. a wind blowing steadily towards the equator from the northeast in the northern hemisphere or the southeast in the southern hemisphere, especially at sea.
  13. 22. Two-dimensional rotation can occur in two possible directions. Clockwise motion proceeds in the same direction as a clock's hands: from the top to the right, then down and then to the left, and back up to the top.
  14. 23. are the low-latitude overturning circulations that have air rising at the equator and air sinking at roughly 30° latitude.
  15. 24. are the latitudes about 30 degrees north and south of the equator. They are characterized by sunny skies, calm winds, and very little perception.
Down
  1. 2. they are dry and cold prevailing winds that blow from the east. They emanate from the polar highs, areas of high pressure around the North and South Poles. Polar easterlies flow to low-pressure areas in sub-polar regions.
  2. 3. is the first and lowest layer of the atmosphere of the Earth, and contains 75% of the total mass of the planetary atmosphere.
  3. 5. is the layers of gases surrounding a planet.
  4. 7. are the result of differential heating.
  5. 8. contains North America, the northern part of South America, Europe, the northern two-thirds of Africa, and most of Asia.
  6. 10. the air around you has weight, and it presses against everything it touches. That pressure is called atmospheric pressure, or air pressure. It is the force exerted on a surface by the air above it as gravity pulls it to Earth.
  7. 12. is something moving in the opposite direction of the hands on a clock.
  8. 17. is the southernmost point on the Earth. It is the precise point of the southern intersection of the Earth's axis and the Earth's surface. From the South Pole, all directions are north.
  9. 21. is a period of the year that is distinguished by special climate conditions.