How the Oceans Formed

What was the state of Earth 4.5 billion years ago?

• A frozen wasteland

• A molten inferno

• A lush green planet

• A dry desert

How did the first oceans on Earth form?

• From river systems

• From condensed rain clouds

• From underground springs

• From melting glaciers

What do scientists believe about the origin of half of Earth's water?

• It came from outer space

• It was always present on Earth

• It was created by plants

• It came from the moon

What did NASA discover about comets in 2005?

• They contain vast amounts of water

• They are made of rock

• They are made of ice

• They contain no water

What is significant about the water in our oceans today?

• It is from recent rainfall

• It is mostly from underground sources

• It is the same water from billions of years ago

• It is entirely new