ES 7.2.1, 7.2.2, 7.2.3, & 7.2.4

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Across
  1. 2. The idea that God placed Earth at just the right distance from the sun and specifically designed Earth's systems to support life is called this.
  2. 5. A storm that can currently be seen on Jupiter.
  3. 6. The maximum diameter of an ellipse.
  4. 7. Backward rotation.
  5. 11. The smallest of the gas giants it has a blue-green hue with outer layers made of methane.
  6. 13. A large circular indentation on a planet's surface.
  7. 15. When a comet changes directly from a solid to a gas.
  8. 20. When meteoroids strike the ground.
  9. 21. This planet is the closest to the sun and the fastest planet.
  10. 22. The second largest planet in the solar system, it is known for its rings.
  11. 25. The planets beyond the asteroid belt.
  12. 27. The time it takes for a planet to orbit the sun.
  13. 30. This is what pulls the moon toward earth and the earth toward the sun.
  14. 31. The point when a planet is farthest from the sun in its orbit.
  15. 33. This planet is sometimes referred to as the red planet because of its strong dust storms.
  16. 35. Half of the major axis of an ellipse.
  17. 38. A halo around a comet.
  18. 39. The solar systems largest and most colorful planet.
  19. 40. The inner planets are also known as this because they are relatively dense, rocky planets.
Down
  1. 1. The time that it takes a planet to rotate on its axis.
  2. 3. Astronomers often refer to comets as these.
  3. 4. Small orbiting bodies with irregular shaped bodies of various sizes.
  4. 8. All of the outer planets are known as this because they are significantly larger than the inner planets and have no known solid surfaces.
  5. 9. The force that resists motion between two surfaces that are in contact with each other.
  6. 10. A closed curve along which the sum of the distances between two fixed points is always the same.
  7. 12. The path planets travel around the sun.
  8. 14. The solid center of a comet.
  9. 16. One tail of a comet is made of dust with charged particles called this...
  10. 17. When many meteors appear to be coming from the same direction within a short period of time.
  11. 18. The point in a planet's orbit when it is closest to the sun.
  12. 19. The average distance between the earth and the sun is called this (abbreviated AU).
  13. 21. The liquid metallic layer around Jupiter.
  14. 23. Also known as a shooting star, it is a meteoroid that passes through the atmosphere and burns up.
  15. 24. Often referred to as Earth's Twin, this planet comes closer to earth than any other planet. It has a very reflective atmosphere making it appear very bright.
  16. 26. The largest example of a KBO.
  17. 28. All of the meteors in a meteor shower appear from the same point in the sky called this.
  18. 29. This planet cannot be seen without a telescope. It has a dark spot similar to Jupiter. It is blue in color.
  19. 32. A broad flat ring of relatively small icy objects orbiting the sun beyond Neptune.
  20. 34. This spacecraft is responsible for mapping the surface of Venus using radar waves.
  21. 36. A small metal or rocky object that is thought to have broken off an asteroid or comet.
  22. 37. A frozen chunk of ice, dust, and rock that gives off trails of dust and charged particles as it passes near the sun during its orbit.