Unit 8 Vocabulary Crossword

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Across
  1. 1. Force of attraction between two objects due to their masses
  2. 4. A rocket launched spacecraft, able to land like an unpowered aircraft, used to make repeated journeys between earth and earth orbit
  3. 6. One complete orbit made by a planet or satellite around another object
  4. 8. The force of gravity at the surface of the Earth or other celestial body
  5. 9. The path that one object in space follows as it revolves around another object in space
  6. 10. A small piece of matter from outer space that becomes a streak of light when it falls through the Earth’s atmosphere and burns up; also known as a falling or shooting star
  7. 12. A planet composed mainly of hydrogen and helium gas (Saturn, Uranus, Jupiter, Neptune)
  8. 13. Instrument designed to make distant objects appear nearer, used to study planets, starts, and other objects in outer space
  9. 14. An unpiloted, unmanned device sent to explore space and gather scientific information. (Examples: Voyager 1 & 2, Hubble Space Telescope)
  10. 15. An object that orbits the Sun; made of frozen water and dust, and has a tail of gas and dust particles that points away from the Sun
Down
  1. 2. The spinning of an object on its axis
  2. 3. planets whose orbit lies WITHIN the asteroid belt (Mercury, Venus, Earth, Mars). All four are considered Terrestrial Planets.
  3. 5. Planet made of compact and rocky surface. The four Innermost planets in the solar system. (Mercury, Venus, Earth, and Mars)
  4. 7. Planets FARTHEST away from the sun (Saturn, Uranus, Jupiter, and Neptune). All four are Gas Giant Planets.
  5. 11. A small, rocky body that orbits the Sun; a large asteroid belt lies between Mars and Jupiter