Gravity Crossword

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Across
  1. 5. The force of gravity acts between all objects in the universe.
  2. 7. famous scientist
  3. 9. a measure of the gravitational pull on that object
  4. 10. a property of matter by which it remains at rest or in unchanging motion unless acted on by some external force
Down
  1. 1. system the collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets. The planets of the solar system are (in order of distance from the sun) Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
  2. 2. the envelope of gases surrounding the earth or another planet
  3. 3. force that pulls objects together
  4. 4. how much space an object is made of
  5. 6. the cloud of dust and gas where our solar system originated
  6. 8. the curved path of a celestial object or spacecraft around a star, planet, or moon, especially a periodic elliptical revolution.