Across
- 1. The Sun is the main source of light energy on _______.
- 3. Stars are visible because _______ energy can travel through space.
- 5. A stove, a heater, and a match can all produce _______ energy.
- 6. _______ rely on light energy for warmth and light.
Down
- 1. Some _______ energy comes from chemical energy stored in batteries.
- 2. _______ use light energy to make their food.
- 4. Burning wood and digesting food are examples of _______ reactions.
- 7. _______ reactions in the Sun release nuclear energy.