Earth's History Review #1 2024

The geologic time scale is divided into four large units known as:

• Eras

• Eons

• Epochs

• Periods

Tags

NGSS.MS-ESS1-4

The oldest eon is:

• Hadean

• Achaean

• Proterozoic

• Phanerozoic

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NGSS.MS-ESS1-4

Complete the statement. The Phanerozoic Eon is divided into ____ eras.

• 2

• 3

• 4

• 12

Approximately how long ago did Earth form?

• 460 years ago

• 460,000 years ago

• 4.6 million years ago

• 4.6 billion years ago

Tags

NGSS.MS-ESS1-4

How would you describe Earth 4 billion years ago?

• Hot

• Covered with molten rock

• Devoid of oxygen

• All of the above

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NGSS.HS-ESS1-6

What were the earliest life forms on Earth?

• Simple, multicellular organisms

• Unicellular plants

• Photosynthesizing bacteria

• Anaerobic microbes

When did the earliest life forms emerge on Earth?

• 4.5 billion years ago

• 3.8 billion years ago

• 2.5 billion years ago

• 550 million years ago

Tags

NGSS.MS-LS4-1

What life forms were responsible for introducing oxygen into Earth’s atmosphere?

• The very first life forms on Earth

• Cyanobacteria

• The first multicellular organisms

• The first land plants

Which of the following was the last life form to appear on Earth?

• Insects

• Reptiles

• Flowering Plants

• Humans

What is a mass extinction?

• The emergence of many new species in a short period of time

• The emergence of very large species

• The loss or death of a very large species

• The loss or death of many different species in a short period of time

Tags

NGSS.MS-LS4-1