Across
- 4. Object that heat has trouble going through
- 5. Energy that attracts things to each other
- 7. Main source of energy
- 8. Energy that can never run out
- 9. Type of electricity made when you rub things together
Down
- 1. How loud or quiet a noise is
- 2. Energy used by computers
- 3. Energy made by vibrations
- 6. Object that heat can easily go through
- 7. Energy from the sun that we can use in things like calculators