Earth's Story (GWS)

The "Big Bang" is a fact.

• True.

• False.

What are fossils?

• Rock layers

• Remains of ancient plants and animals, or traces of them

• Shows the time since earth began

• Dead animals

The longest unit of geologic time is a(n) ____

• Eon

• Era

• Period

• Epoch

The shortest unit of geologic time is a(n) ____

• Eon

• Era

• Period

• Epoch

The sudden appearance of multicellular life is known as the ____.

• Precambrian explosion

• Cambrian explosion

• Permian explosion

• Jurassic explosion

What is extinction?

• The emergence of a new species

• The decline of a species

• A type of natural disaster

• The complete loss or death of a species

True or false: Mesozoic means "middle life" 

• True

• False

The oldest fossil evidence of life on Earth is from:

• Precambrian

• Phanerozoic

• Cambrian

• Jurassic

What can cause mass extinction?

• Climate change

• Asteroid impact

• Volcanic activity

• All of the above

Scientists think the first life form was:

• mammals

• bacteria

• insects

• jellies