Across
- 1. The most abundant element formed after the Big Bang
- 7. The smallest building blocks of matter
- 10. The dense point where the Big Bang began
- 11. All space, time, matter, and energy as a whole
- 14. The two fundamental "ingredients" of the Universe
- 15. The leftover heat radiation from the Big Bang
Down
- 2. The universe is still doing this today
- 3. Our galaxy is one example of these huge star systems
- 4. The idea that explains the origin of the universe
- 5. The unit of distance light travels in one year
- 6. The second most abundant element formed after the Big Bang
- 8. the shift of light toward longer wavelengths as galaxies move away
- 9. Bang The event that marks the beginning of space and time
- 12. Tools scientists use to study distant galaxies
- 13. The force that pulls matter together