Earth's History Quiz

How old is the Earth?

• 4.5 billion years

• 1 million years

• 10,000 years

• 100 years

What was Earth like 4.5 billion years ago?

• Covered in forests

• Covered in ice

• Covered in water

• Covered in lava

What event formed the moon?

• Collision with Theia

• Volcanic eruption

• Tectonic plate movement

• Meteor impact

How does the moon's size change over time?

• It shrinks

• It grows

• It disappears

• It stays the same

What is the first eon of Earth called?

• Neoarchean

• Hadean

• Paleoarchean

• Mesoarchean

What was the atmosphere like during the Hadean eon?

• Mostly nitrogen

• Mostly oxygen

• Mostly water vapor

• Mostly CO2

What evidence suggests there may have been water during the Hadean eon?

• Minerals called zircons

• Ancient writings

• Ice samples

• Fossilized remains

What was the climate like during the Hadean eon?

• Extremely cold

• Unknown

• Extremely hot

• Moderate temperature

When did the first cells begin to spread on Earth?

• 100 years ago

• 10,000 years ago

• 1 billion years ago

• A few hundred million years after the beginning of everything

What are stromatolites?

• Sedimentary rocks built by microorganisms

• Volcanic rocks

• Fossilized dinosaur bones

• Crystals formed by heat and pressure