Across
- 2. invisible waves with more energy than visible light that can cause sunburn or kill germs.
- 4. a flat mirror that produces a life-sized, upright image.
- 6. when waves pass through a material.
- 10. waves used to see inside the body or objects like luggage.
- 11. the small part of the electromagnetic spectrum that humans can see.
- 13. when energy is taken in by a material and usually turned into heat.
- 14. when a wave changes speed as it passes through different materials.
Down
- 1. a mirror that focuses light rays and can produce magnified images when close.
- 3. a mirror that spreads light rays and produces smaller, upright images.
- 5. electromagnetic waves used to heat food by energizing atoms.
- 7. when light bounces off a surface (like a mirror).
- 8. image an image that is straight (not upside down).
- 9. high-energy waves with the shortest wavelengths, used to treat cancer.
- 12. electromagnetic waves that detect heat and help create images in the dark.