Vocabulary

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Across
  1. 2. When light bounces off a surface
  2. 3. The most powerful, highest-energy type of radiation
  3. 5. Bending of light when it passes between materials
  4. 7. When the moon appears to grow brighter
  5. 9. Invisible energy from the sun with shorter wavelengths than visible light
Down
  1. 1. Energy that travels through space (
  2. 2. Movement of one object orbiting another
  3. 4. Spinning of an object on its axis
  4. 6. How tightly packed matter is in a space
  5. 8. The amount of matter in an object