Across
- 1. a change in a system leading to further change
- 3. movement of energy as electromagnetic waves
- 7. movement of matter caused by different densities
- 8. radiation does not require this
- 9. this is tilted at 23.5 degrees
- 10. the ability to do work
- 12. measure of percentage of light reflected
Down
- 2. light or energy taken in
- 4. gradual buildup
- 5. source of nearly all energy on Earth
- 6. energy from the sun is balances by amount reflected
- 7. transfer of heat by touch
- 11. energy is bounced off