Back to Glossary
Glossary

Protoearth

The early version of Earth as it was forming about 4.5 billion years ago, before it became the planet we know today.

ClownfishYellow FishButterflyfishSeaweedJellyfishTurtle
This word have been used in
Browse all lessons
Hands-On
New
Flashback 4 Billion Years
It's time to travel back billions of years to discover how Earth and its oceans were first formed.
Go to Lesson