Retake Quiz - Geologic Eras

Which era was the longest, taking up 88% of geologic time?

• Precambrian

• Paleozoic

• Mesozoic

• Cenozoic

Snowball Earth was a result of

• Extra cold coming from the Sun

• Less carbon dioxide in the Earth's atmosphere

• More carbon dioxide in the Earth's atmosphere

What happens to the temperature if more greenhouse gases are released into the atmosphere?

• Temperature goes up
• Temperature goes down

What classifies a mass extinction?

• Only 5% of species go extinct.

• Massive flooding due to hurricanes.

• Happens in a relatively short period of time and is global

• There have never been any mass extinctions on Earth.

In this graph, the dependent variable is ______ (choose the BEST answer)

• Extinction Occurrences

• Extinction Occurrences (%)

• Time

• Millions of Years before present time

Which extinction is considered the largest mass extinction in Earth's history? Basically 96% of all species on Earth disappeared.

• Ordovician Extinction

• Devonian Extinction

• Permian Extinction

• Triassic Extinction

• Cretaceous Extinction

When most of the major groups of animals first appear in the fossil record.

• Law of Superposition

• The Great Dying

• Great Cambrian Explosion

• Era

Along with insects, this period is known as the age of amphibians.

• Carboniferous

• Devonian

• Permian

• Silurian

485 Mya - 443 Mya.  Mollusks and arthropods dominated the oceans.  Fish appeared during this period.

• Ordovician
• Devonian
• Cambrian
• Silurian

What was Pangaea?

¿Qué fue Pangea?

• An extinct species of fish

• A super-continent (all the continents connected)

• A large desert that covered all of Africa at one point

• A layer of rock in the rock record from 3.4 million years ago