- 4.5 billion years ago the sun was around a ring of gas
- The sun cooled and minerals formed
- The minerals stick together to make rocks
- The rocks keep on getting bigger and bigger
- The Earth then melted
- The heavier material sank to the core
- The lighter material floated to the surface
- The Earth started to crusted
- All the rock blown into space made the moon
- Every rock that came on Earth brought a little bit of water
- In some rocks they carried amino acids
- Meteorites contained amino acids
- Trees make oxygen
