Exploring Earth's History- A Journey through Geologic Time

What is Geologic Time?

• Geologic time refers to the vast span of Earth's history

• Geologic time refers to dinosaurs

• Geologic time refers to a clock

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NGSS.MS-ESS1-4

Geologic time covers approximately _______ billion years

• 4.0

• 5.6

• 4.6

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NGSS.MS-ESS1-4

What are the four units that geologic time is separated into?

• icon, eras, periods, century

• eons, eras, periods, epochs

• years, days, months, weeks

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NGSS.MS-ESS1-4

The Geologic time scale is a (a)   representation of Earth's history

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NGSS.MS-ESS1-4

What are the four major divisions of the geologic time scale?

• precambrian, paleozoic, mesozoic, cenozoic

• ice age, prehistory, current, post

• precolumbian, paleo, masa, century

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NGSS.MS-ESS1-4

When did the Paleozoic Era occur?

• 4.6-541 million years ago

• 252-66 million years ago

• 541-252 million years ago

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NGSS.MS-ESS1-4

The Precambrian Era covered what percentage of geologic time?

• 75%
• 95%
• 88%

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NGSS.MS-ESS1-4

Paleozoic Era means _________ _______

(a)  

The Paleozoic Era or Cambrian explosion resulted in what?

• The formation of the first land plants and trees.
• A rapid diversification of life forms and the emergence of many major animal groups.
• A decline in biodiversity and extinction of many species.

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NGSS.MS-LS4-1

The Mesozoic Era or "Age of the Reptiles" was characterized by the dominance of what?

• Dinosaurs
• Mammals
• Birds
• Amphibians

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NGSS.MS-LS4-2