Across
- 1. a force that seeks towards the center
- 4. the extent of a vibration
- 6. a high-energy, high-speed electron
- 9. Speed, the rate of change
- 10. A subatomic particle with a negative charge
- 11. Electromagnetic radiation used in electric cookers
- 15. electromagnetic radiation can be detected by the human eye
- 16. A subatomic particle with the positive charge
- 17. a fundamental constituent of matter
- 19. Measured in hertz (Hz)
- 20. the essence of the atomic bomb; involves atoms
- 21. This person invented calculus
Down
- 2. inactivity or resistance
- 3. The smallest Unit
- 5. wave of high energy and very short wavelength
- 7. Main purpose is to store energy
- 8. measured in Joule (J)
- 12. small region with protons and neutrons at the center of an atom
- 13. a quantum of light
- 14. the slight bending of light as it passes around the edge of an object
- 18. The pull of the Earth's core