Across
- 6. The creation of new atomic nuclei
- 10. Constituents of protons and neutrons
- 11. An element with only one proton
- 12. The shift in absorption spectral lines towards red wavelengths indicate that objects like stars are moving away from us (___-_____)
Down
- 1. Electrons and neutrinos are both _____
- 2. An element with only two protons
- 3. Produced in the Big Bang, but unstable and destroyed by nuclear reactions
- 4. Fundamental particles that are photons
- 5. Summarizes a hypothesis supported by repeated testing and observation
- 7. Makes up 70% of the universe: Dark _____
- 8. As it ages, the universe is constantly ____
- 9. Edwin _____ showed us how to measure distances in space