Across
- 3. States that universe began in a singularity
- 7. Named after the predominance of radiation
- 8. Strong nuclear force splits
- 9. All the ingredients are present
Down
- 1. The remaining forces finally split off
- 2. Protons and Neutrons fused to create nuclei
- 4. Universe rapidly expanded
- 5. No matter existed, only energy
- 6. Quarks binded to form protons and neutrons