Chapter 2: The Dynamic Earth

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Across
  1. 5. The parts of the world north of the equator.
  2. 6. The water layer of the earth.
  3. 7. The theory of how continents move over time.
  4. 9. A piece of rock that hits the surface of a planet or moon after traveling through space.
  5. 12. The heavier crust that makes up the ocean floor.
  6. 14. A period of global cooling.
  7. 15. The effect of Earth’s spinning on the movement of air from the equator to the poles and back.
  8. 19. A form of nitrogen that most plants can absorb.
  9. 20. To move in a circle around a point.
  10. 22. A straight line an object seems to rotate around.
  11. 23. An enormous mass of ice located at both the North and South poles.
  12. 25. The basic building block of matter.
  13. 27. Matter that has only one kind of atom.
  14. 28. The first organism on Earth to use sunlight to make their own food; also known as blue-green algae.
  15. 32. Water found underground.
  16. 33. The layer of the earth that surrounds the core.
  17. 36. The three major wind belts on Earth.
  18. 38. The outer layer of the Earth.
  19. 39. The layer of the atmosphere above the mesosphere.
  20. 41. The study of plates and how they move.
  21. 42. The hot center of the earth.
  22. 44. The single landmass on Earth that began to break up 200 million years ago.
  23. 45. An opening in the Earth that lets out gases and other materials.
  24. 48. The process of water changing from a liquid to vapor.
  25. 49. Poisonous
  26. 50. A thick mass of ice that covers a large area.
  27. 52. The movement of water from inside a plant through its pores and into the atmosphere.
  28. 54. A tiny organism that lives in one of Earth’s harshest environments.
  29. 55. The remind of animals and plants found in rocks.
  30. 56. Water or other materials in the form of a gas.
  31. 57. The layer of the atmosphere between the stratosphere and thermosphere.
  32. 59. The solid surface and interior of the earth.
  33. 60. Melted into a liquid.
  34. 61. The parts of the world south of the equator.
Down
  1. 1. A strong air current high in the atmosphere.
  2. 2. The remains of something that was destroyed.
  3. 3. To turn in a circle.
  4. 4. A chemical change.
  5. 7. The process of changing from a gas to a liquid.
  6. 8. A radioactive element that helps scientists determine a rock’s age.
  7. 10. An explosion from beneath the earth’s surface.
  8. 11. A tiny piece.
  9. 12. The source or beginning.
  10. 13. The lighter crust that makes up the continents.
  11. 16. High-energy radiation from the sun.
  12. 17. The movement of water between the atmosphere and the earth’s surface.
  13. 18. The amount of moisture in the air.
  14. 21. Areas of land near the equator.
  15. 24. A form of nitrogen that some plants can absorb.
  16. 26. The simplest organisms that carry out all basic life activities.
  17. 29. The layer of the atmosphere people live and breathe in.
  18. 30. Pressure caused by the weight of the atmosphere.
  19. 31. A layered rock formed of sand, gravel, and mud.
  20. 34. The moment-by-moment conditions in the atmosphere.
  21. 35. A system that provides everything needed to stay alive.
  22. 37. The imaginary line halfway between the North and South poles.
  23. 40. The parts of the earth where living things are found.
  24. 43. The layer of the atmosphere that protects Earth from harmful solar radiation.
  25. 44. The moisture that falls to the earth from the atmosphere.
  26. 46. Fossilized evidence that helps scientists understand past climate conditions.
  27. 47. The layer of the Atmosphere above the troposphere.
  28. 51. The average weather in a particular area.
  29. 53. The layer of air surrounding the earth.
  30. 58. A ball of ice, rock, frozen gases, and dust that orbits the sun.