1. BIG BANG TIMELINE FILL IN YOUR MISSING DATA

2. THE BIG BANG 0 to 10 -43 seconds Temperature- theorized to be infinite Infinitely small, Infinitely Dense, Primeval Fireball Only 1 force exists- Supergravity

3. PLANCK TIME 10 -43 seconds Temperature- 10 32 Kelvin Earliest known time that can be described by Modern physics 2 forces- Gravity, and Grand Unified Theory GUT

4. END OF GUT 10 -35 seconds Temperature- 10 27 Kelvin 3 forces exist- Gravity, Strong Nuclear Force, Weak Force Quarks and Leptons form (along with their anti- particles)

5. INFLATION 10 -35 to 10 -33 seconds Temperature- 10 27 Kelvin Universe increases in size by a factor of 10 30 to 10 40

6. END OF UNIFIED FORCES 10 -12 seconds Temperature- 10 15 Kelvin 4 forces found in nature- Strong, Weak, Electromagnetic, and Gravity Protons and Neutrons begin to form from quarks

7. HEAVY PARTICLES 10 -7 seconds Temperature- 10 14 Kelvin Protons and Neutrons forming at full speed

8. LIGHT PARTICLES 10 -4 seconds Temperature- 10 12 Kelvin Electrons and their opposite particles (positrons) form

9. NUCLEOSYNTHESIS 100 seconds Temperature- 10 9 -10 7 Kelvin Helium, Deuterium, and a few other elements form

10. RECOMBINATION/DECOUPLING 380,000 years Temperature- 3000 Kelvin Matter and Radiation separate Radiation domination ends and matter takes over the Universe

11. GALAXY FORMATION 400-500 million years Temperature- 10 Kelvin Galaxies and other large structures form in the Universe

12. NOW Approximately 13.7 billion years later Temperature- 3 Kelvin We sit here and take these notes today…