Unit 4 Space Vocabulary Review

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Across
  1. 3. Another name for Jovian planets.
  2. 6. Sphere-shaped group of small rock and ice that are the furthest objects from the sun
  3. 8. Having more mass or objects moving closer together causes a ______ in gravity.
  4. 11. When a space rock lands on the earth.
  5. 12. A chunk of ice and rock originating from the outer solar system, often accompanied by a tail. Does not enter the atmosphere.
  6. 15. Area beyond Neptune that has comets and dwarf planets such as Pluto.
  7. 17. Having less mass or objects further apart causes a ______ in gravity.
  8. 19. This is found in our atmosphere and is responsible for blocking harmful UV radiation.
  9. 24. Responsible for trapping heat and helping keep the planet warm. Made mostly of Nitrogen and Oxygen.
  10. 25. First planet from the sun
  11. 26. Sixth planet from the sun
  12. 27. changes based on location, measured in N, represents the amount of force on an object due to gravity.
  13. 28. does not change based on location, measured in kg or g, represents how much matter makes up an object.
  14. 30. As gravity increases the speed/velocity of an orbiting object gets _______.
  15. 31. When a space rock enters the atmosphere and starts burning up, creating a streak of light. These are shooting stars!
  16. 32. Force of attraction between two objects due to their mass
  17. 33. An area around a star where it is neither too hot nor too cold for liquid water to exist on the surface of the planets within the area.
Down
  1. 1. Describes how close an object is to a point of reference.
  2. 2. The action of rotating around an axis or center.
  3. 4. As gravity decreases the speed/velocity of an orbiting object gets _______.
  4. 5. an average-sized star, composed of helium and hydrogen, at the center of the solar system
  5. 7. A rock in space that’s bigger than a dust grain but smaller than an asteroid.
  6. 9. The motion of an object around a point, such as a planet or sun
  7. 10. A large rock in orbit generally between Mars and Jupiter. These rocks are large but smaller than planets.
  8. 13. Mercury, venus, earth, and mars are all __ planets
  9. 14. Seventh planet from the sun
  10. 16. Eighth planet from the sun
  11. 18. Jupiter, Saturn, Uranus, and Neptune are all __ planets.
  12. 20. Second planet from the sun
  13. 21. Third planet from the sun
  14. 22. The process in which plants create oxygen and chemical energy, which is one reason why life exists on earth.
  15. 23. Fourth planet from the sun
  16. 29. Fifth planet from the sun