Across
- 3. Particles smaller than an atom.
- 5. What is the leading theory for the creation of the universe?
- 7. The first subatomic particle in the universe.
- 9. Someone who helped prove the universe is expanding and create a classification system for the galaxies.
- 10. The ________ is expanding.
Down
- 1. The range of frequencies of the electromagnetic radiation, and their wave lengths.
- 2. The person who created the theory of relativity.
- 4. The emission of energy as electromagnetic waves.
- 6. What universe do we live in?
- 8. The big bang theory predicts the temperature of the universe is getting _______ as it expands.