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