Across
- 2. become or make larger or more extensive
- 9. static airwaves
- 10. the entire distribution of electromagnetic radiation according to frequency or wavelength
Down
- 1. a proton and a electron forms
- 3. two electrons, and two protons, two neutrons in the nucleus forms
- 4. particles were created at the begging of the BigBang
- 5. the emission of energy as electromagnetic waves or as moving subatomic particles
- 6. is a theory that suggests that our universe is always expanding
- 7. sprawling systems of dust, gas, dark matter, and anywhere from a million to a trillion stars that are held together by gravity.
- 8. is made up of all matter and space that exists.