Earth's Changes Over Time 7

States that younger rocks lie above older rocks if the layers have not been disturbed

• Law of crosscutting
• Law of superposition
• Relative Dating
• Unconformity

How do most fossils form?

• An insect becomes trapped in amber.

• An entire organism becomes frozen in ice.

• A dead organism becomes buried in sediment.

• A dead organism becomes buried in tar.

Which layer is the oldest? 

• c
• a
• b
• d

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NGSS.MS-ESS1-4

The Law of Superposition helps scientists to determine what?

• The absolute age of rock layers
• The age of fossils
• The relative age of rock layers
• the super powers of rocks

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NGSS.MS-ESS1-4

Which fossil would make the best index fossil? Explain why.

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Which is an example of absolute age?

• "This trilobite is older than that dinosaur."

• "That stromatolite is the absolute oldest fossil I've ever seen."

• "Velociraptors lived 71-75 million years ago."

• "The oldest sedimentary layer is on the bottom."

Which two are fossil casts?

• 
• 
• 

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NGSS.MS-LS4-1

Identify the type of fossil in this image:

• Mold

• Cast

• Trace

• Mineral Replacement

• Carbon Film

Consider the different types of fossils. Do all casts come from molds? Explain.

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Which of the following is NOT a fossil fuel?

• Coal

• Oil

• Natural Gas

• Wood