Across
- 2. You need this to survive
- 5. A theory that says our universe is expanding
- 6. Second element on the Periodic table
- 7. All mater and space that exists
- 8. The other name for the Crab Nebula
- 10. Something used to study light
Down
- 1. Particles of what all matter is composed of
- 3. Creator of the Theory of relativity
- 4. The third element on the periodic table
- 9. First element on the periodic table