History of Earth

What is relative dating?

• in a sequence of sedimentary rock layers, each layer of rock is older than the layer above it and younger than the rock layer below it.

• Comparing objects to determine their estimated age and the order of past events.

• Geologic feature which cuts another is the younger of the two features.

• the study of rock layers.

Tags

NGSS.MS-ESS1-4

What is law of superposition?

• the study of rock layers.

• Comparing objects to determine their estimated age and the order of past events.

• in a sequence of sedimentary rock layers, each layer of rock is older than the layer above it and younger than the rock layer below it.

• sedimentary layers of rock

Tags

NGSS.MS-ESS1-4

What is cross cutting relationships?

• in a sequence of sedimentary rock layers, each layer of rock is older than the layer above it and younger than the rock layer below it.

• Comparing objects to determine their estimated age and the order of past events.

• Geologic feature which cuts another is the younger of the two features

• the study of rock layers.

What are Rock Stratas?

• sedimentary layers of rock

• Comparing objects to determine their estimated age and the order of past events.

• in a sequence of sedimentary rock layers, each layer of rock is older than the layer above it and younger than the rock layer below it.

• the study of rock layers.

Tags

NGSS.MS-ESS1-4

What is wrong with these rock layers?

• There is nothing wrong with the rock layers

• The dike should be the 4th because it cuts through 3 rock layers first

• The bottom layer is the youngest so it should be labeled 7

• the dike cuts through 5 rock layers

Tags

NGSS.MS-ESS1-4

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What is the order of the rock layers from oldest to youngest?

• B,D,I,J,G,A,E,C,H,F

• B,D,J,I,A,G,C,E,F,H

• B,D,J,I,A,G,E,C,F,H

• D,B,A,G,J,I,C,E,F,H

Tags

NGSS.MS-ESS1-4

What are index Fossils?

• The mineralized remains of organisms and the rock layers in which they are found

• Fossils of organisms that were abundant and went extinct (so they existed for a limited time) and are only found in one specific rock layer. They are used to identify a geologic period.

• The mineralized remains of organisms and the rock layers in which they are found. Soft tissues are extremely uncommon.

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

NGSS.MS-ESS2-3

Looking at this image, how would you describe the change in species through the eras?

• At the beginning there were complex species that later evolved to microorganisms.

• There was no change

• At the beginning there were no species to microorganisms, then to complex species.

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

What can an index fossil tell scientists?

• How the environment was like and mass extinctions

• Nothing

• Mass extinctions only

• Everything!

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What could indicate a new era being created on the geological time scale?

• Extinctions and the appearance of new life forms

• an earthquake happened

• new life form was created

• new rock layers were formed

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1