Unit 4

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Across
  1. 2. Continuous movement of seawater driven by wind, temperature, and salinity.
  2. 6. The deflection of moving air and water due to Earth’s rotation.
  3. 9. The layer of gases surrounding Earth, composed mainly of nitrogen, oxygen, and trace gases.
  4. 12. U.S. program paying farmers to remove environmentally sensitive land from production and plant species that improve environmental quality.
  5. 14. Long-term patterns of temperature and precipitation in a region.
  6. 17. plates move apart, forming rift valleys and mid-ocean ridges.
  7. 18. plates collide, forming mountains or subduction zones
  8. 20. The ability of soil to transmit water.
  9. 22. Process where water carries dissolved nutrients downward through soil layers.
  10. 24. The amount of pore space in soil that can hold air or water.
  11. 26. Breakdown of rocks into smaller particles by physical, chemical, or biological processes.
  12. 27. The source of a river or stream.
  13. 30. A climate pattern where warming of the eastern Pacific Ocean alters global weather.
  14. 31. Fourth layer; very thin air, auroras occur here.
  15. 34. Dry area on the leeward side of a mountain, caused by air losing moisture as it rises and cools.
  16. 36. Flat land near a river that floods periodically, depositing nutrient-rich soil.
  17. 37. Lowest layer of the atmosphere; weather occurs here.
  18. 38. Horizons Distinct layers in soil (O, A, B, C) that vary in composition and properties.
Down
  1. 1. Belt Global thermohaline circulation that moves warm and cold water around the globe.
  2. 3. A boundary where plates slide past one another, often causing earthquakes.
  3. 4. A smaller stream that flows into a larger river.
  4. 5. The amount of sunlight energy reaching Earth’s surface.
  5. 7. Steady winds blowing from east to west in the tropics.
  6. 8. Second layer; contains the ozone layer that absorbs harmful UV radiation.
  7. 10. Sudden release of energy in Earth’s crust, producing seismic waves.
  8. 11. A large ocean wave generated by undersea earthquakes, landslides, or volcanic eruptions.
  9. 13. – The reflectivity of a surface; higher albedo surfaces (like ice) reflect more solar radiation.
  10. 15. The opposite of El Niño; cooler Pacific waters influence global climate patterns.
  11. 16. The land area that drains into a particular river or stream system.
  12. 17. Drying out of soil, reducing fertility.
  13. 19. Outermost layer, merging into space.
  14. 20. The area where two tectonic plates meet; can be divergent, convergent, or transform.
  15. 21. Short-term atmospheric conditions in a specific place.
  16. 23. Large circular ocean current systems driven by global winds and the Coriolis Effect.
  17. 25. The theory that Earth’s lithosphere is divided into plates that move over the asthenosphere, driving earthquakes, volcanoes, and mountain building.
  18. 28. Third layer; where most meteors burn up.
  19. 29. Degradation of land in arid areas due to overuse, climate, or deforestation.
  20. 32. sand, silt, clay – The relative proportions of particle sizes in soil; influences fertility and drainage.
  21. 33. Buildup of salts in soil, often from irrigation.
  22. 35. An opening in Earth’s crust where magma, gases, and ash erupt to the surface.