Unit 5 Crossword

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Across
  1. 1. A natural satellite which orbits around a planet
  2. 3. A cluster of billions of stars, held together by gravity.
  3. 5. The Universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy.
  4. 6. Molten rock that is expelled out of a volcano
  5. 7. A material that absorbs water
  6. 9. Area of land where rubbish is buried to dispose of it
  7. 10. Molten rock inside a volcano
Down
  1. 1. The galaxy we live in
  2. 2. Movement around an object in a circular or elliptical manner
  3. 4. A model of the solar system which stated that the Sun is the centre of the solar system
  4. 8. Oval shaped