Unit 5 List 1

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Across
  1. 3. system the sun, other bodies like asteroids and meteors, and the planets that orbit the sun
  2. 4. of the most frequently seen type
  3. 7. an invisible, protective blanket of air around Earth and other heavenly bodies
  4. 8. a curved path something in space takes around another object in space; planets move in an orbit around the sun
  5. 12. a scientist who studies stars, planets, and outer space
  6. 13. a tool used to explore something, such as outer space
  7. 14. a building with a transparent glass or plastic roof and walls made to trap in heat from the sun and grow plants all year round
  8. 15. extremely cold
Down
  1. 1. a gas that is lighter than air and easily catches fire
  2. 2. a very large cluster of billions of stars, dust, and gas held together by gravity and separated from other star systems by a large amount of space
  3. 4. a frozen ball of dust and ice that travels through outer space
  4. 5. a space rock, smaller than an asteroid, that orbits the sun
  5. 6. all objects and matter in space including Earth and beyond
  6. 9. a space rock, smaller than a planet, that orbits the sun
  7. 10. a natural or man-made object that orbits a planet or smaller object
  8. 11. to flow or trail