8.4 Vocabulary Review

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Across
  1. 2. A force between TWO objects. The magnitude (size) of the force depends on the mass of the objects and the distance between them
  2. 6. small piece of rock if it reaches Earth’s surface
  3. 8. The size and distance of one object relative to another.
  4. 10. Rocky bodies orbiting the sun, mostly between Mars and Jupiter
  5. 11. A very diffuse (spread out) collection or cloud, of gas and dust in outer space.
  6. 13. the tendency to not change in motion unless acted upon by an unbalanced force.
  7. 14. Friction forces caused by the particles of air pushing against the motion of objects moving through them.
  8. 17. The lack of any air (atmosphere) particles in a volume
  9. 18. Small piece of rock in the solar system
Down
  1. 1. A system of solar systems, stars, gas, dust, and other matter
  2. 3. The motion pathway determined by the forces of gravity of objects in space
  3. 4. The force from gravity (usually in pounds or newtons) which Earth exerts on another object.
  4. 5. The forces caused by one surface or object rubbing against another as they move past each other.
  5. 7. A change in the speed or direction of an object
  6. 9. Described with a clearly identified reference frame (or point) from which an object’s motion is being measured
  7. 12. direction the object would travel if inward acting forces are removed
  8. 15. small piece of rock if it enters Earth’s atmosphere
  9. 16. Small icy object orbiting the sun that may have a long “tail” or halo when closer to the sun