Across
- 2. a scientific statement that is most likely true
- 5. the stretching of wavelength due to motion
- 7. what scientists use to convey an idea or concept
- 8. the abbreviation for cosmic microwave background radiation
- 9. all living stars perform this process
- 11. the fuel that all stars eventually run out of
Down
- 1. the expansion of space that formed the universe
- 3. the graph that shows various properties of stars
- 4. "energy cannot be _______ or destroyed"
- 6. this is how we know the composition of space
- 10. something unique based on the number of protons in an atom's nucleus