Across
- 4. Magnetic field that shields Earth from some of Sun’s radiation
- 5. theory of how universe began
- 6. splitting of an atomic nucleus
- 7. All of space and everything in it
- 8. combining of atoms
- 9. the center of mass
- 10. the spreading of energy without touching
Down
- 1. spinning motion of a planet on its axis
- 2. movement of an object around another object
- 3. Law about how the universe is expanding