Classroom visuals
Film info
Film summary
The same water has been on Earth for four and a half billion years. Where did this water come from?Key facts
- 4.5 billion years ago, the Earth's surface was too hot for water to exist.
- Inside the Earth's core, oxygen and hydrogen had bonded to create masses of steam.
- Thousands of volcanoes erupted, emitting the steam into the atmosphere.
- The Earth cooled, causing thousands of years of rainfall - which provided half of the world's water.
Transcript
Today, 70% of the Earth's surface is covered in water.
But in Earth's infancy, 4.5 billion years ago, there was no water here at all.
Earth was a molten inferno. It was too hot for liquid water to exist!
But inside the Earth's core, oxygen and hydrogen had bonded to create the gaseous ...
Please log in to view and download the complete transcript.
