1. The solar system formed over 4.5 billion years ago. Describe how the four fundamental forces helped shape and evolve our solar system. Describe how the inner and outer planets, asteroid belt, Kuiper belt and Oort cloud formed.

1. Sketch the interior of the Earth, and described how it formed.
2. Sketch the interior structure of the Sun, and describe, illustrate if you have to, the 5 states of equilibrium the sun undergoes.
3. How did the moon form and how can you tell the its history through its craters? Illustrate your response if needed.
4. A five thousand kilogram meteor and a twenty thousand kilogram meteor are about to hit the moon. Calculate both of their kinetic energies if the least massive meteor is traveling at 10,000 m/s and the other one traveling at 2,500 m/s. Which has the most kinetic energy? Which one will make a bigger crater?