Lesson 1: Geologic Time

What type of event usually marks the end of an Era

• A Mass Extinction

• A Quinceanera

• An earthquake

• A Volcanic Eruption

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NGSS.MS-ESS1-4

NGSS.MS-LS4-1

The geologic time scale is a record of....

• the history of fossils only
• the history of rocks
• the history of rock layers and fossils
• geologist notes

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NGSS.MS-ESS1-4

Earth is thought to be formed ______ years ago?

• 200 thousand

• 3 million

• 4.6 billion

• 13.8 billion

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NGSS.MS-ESS1-4

NGSS.MS-ESS2-2

What evidence do we have about what happened on Earth millions of years ago?

• We have written accounts

• We have video evidence

• Nothing happened on Earth millions of years ago

• We have fossils to show what Earth was like

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NGSS.MS-LS4-1

NGSS.MS-ESS2-3

Geologic processes that occur today are similar to those that occurred in the past and...

• will continue to happen in the future

• won't happen in the future

• they don't happen today, they only happened in the past

• None of these

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NGSS.MS-ESS2-2

strata used a unique marker for a major geologic event

• fossil

• index fossils

• geology

• key bed

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Which of the following would make a good key bed for geologists?

• Volcanic ash found over a continent

• Red rock sediment found in Utah only

• Metamorphic rock found in a local mountain range

• none of these

Volcanic ash deposits such as these are usually excellent geologic time markers because they

• occur at regular time intervals

• spread over a large area in a short amount of time

• represent a time gap in the rock record

• contain index fossils from different time periods

Tags

NGSS.MS-ESS1-4

What would the be appropriate scale to describe how geologists study strata in multiple locations.

• Regional Scale

• Global Scale

• Microscale

• Molecular Scale

Tags

NGSS.MS-ESS2-2

Select ALL options that describe a key bed:

• Unique Strata (Iridium or Volcanic Ash)

• Found in multiple locations in a large area

• Found in one location or small area

• Sedimentary or Metamorphic Strata similar to ones above or below it.