Record of Life
- Early Earth- was a deadly wasteland, covered in fire, poison air and water, meteors raining down like snow falling.
- early Earth's atmosphere- Scientist believe that early earth atmosphere was mainly carbon their was no oxygen.They say that it was greatly limited. It had some amounts of water vapor. They say it was caused by all the volcanic activity. Scientist theories the atmosphere colors was Purple.
- History in Rocks
- Fossils-remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.
- Fossils form- when a plant or animal dies in a watery environment and is buried in mud and silt. Soft tissues quickly decompose leaving the hard bones or shells behind. Over time sediment builds over the top and hardens into rock.