Across
- 3. ___ objects allow all light to pass through
- 5. Oil on door hinges is an example of _____
- 6. the strongest magnet shape
- 9. converts wind energy into electrical energy
- 10. Reflects the Sun's light
Down
- 1. The heat energy within our planet
- 2. Candles are a ______ light source
- 4. ____ indicate that lines of force originate from the North Pole
- 7. The sure test for magnetism
- 8. A magnet has __ poles
- 11. The force that holds particles together in a nucleus