Solar System

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Across
  1. 5. The light and energy that come from the sun.
  2. 8. The measure of how far an object's orbit is from being circular.
  3. 9. A measure of how hard it is to stop a moving object.
  4. 10. An object that orbits a star, is large enough to be nearly spherical(round) in shape, and has no other objects in its orbital path.
  5. 11. The planets in our solar system--Jupiter, Saturn, Uranus and Neptune--that have thick atmospheres and don't have solid outer layers.
Down
  1. 1. a stretched-out circle
  2. 2. An attractive force that exists between all objects that have mass
  3. 3. The tendency for objects in motion to resist changes to their direction and speed
  4. 4. The amount of material contained in an object, such as gas or dust.
  5. 6. A measurement of how compact an object is.
  6. 7. A group of planets and other objects that revolve around a star.