Science

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Across
  1. 4. When light bounces off an object
  2. 6. A natural luminous body visible in the sky especially at night
  3. 7. A groups of stars and other space objects held together by gravity.
  4. 10. An empty, blank or available area
  5. 13. A celestial body that orbits around the Sun
  6. 14. A type of space object that is smaller than a regular planet
  7. 15. The large round object that circles the Earth
  8. 16. When the phase of the moon is getting smaller
  9. 18. half-moon but less than full
  10. 20. How much matter something has
  11. 21. The invisible force that pulls all objects
Down
  1. 1. An influence that can change the motion of an object.
  2. 2. A copy of an object that is larger or smaller than its actual size
  3. 3. Rate at which velocity changes with time, in terms of both speed and direction
  4. 5. The planet on which we live
  5. 8. A star which is located at the center of our solar system.
  6. 9. Small, rocky objects that orbit the Sun.
  7. 11. The whole mass of air that surrounds the earth
  8. 12. A repeating path that an object in space takes around another one
  9. 17. An imaginary line on which a body rotates
  10. 19. When the phase of the moon are getting bigger