Front

What is a fossil?

Back

A fossil is the preserved remains or traces of a once-living organism, often found in sedimentary rock.

Tags

NGSS.MS-LS4-1

Front

What are sedimentary rocks?

Back

Sedimentary rocks are types of rocks formed by the accumulation and compaction of mineral and organic particles.

Tags

NGSS.MS-ESS2-1

Front

How do fossils form?

Back

Fossils form when organisms are buried quickly after death, preventing decay, and over time, sediments harden around them.

Front

Which layer of rock typically contains the oldest fossils?

Back

The oldest fossils are usually found in the lowest layers of sedimentary rock.

Tags

NGSS.MS-ESS1-4

Front

What is the Law of Superposition?

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The Law of Superposition states that in undisturbed layers of rock, the oldest layers are at the bottom and the youngest are at the top.

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NGSS.MS-ESS1-4

Front

What is compaction in sedimentary rock formation?

Back

Compaction is the process where sediments are pressed together under pressure, reducing their volume.

Tags

NGSS.MS-ESS2-1

Front

What is cementation in sedimentary rock formation?

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Cementation is the process where dissolved minerals crystallize and bind sediment particles together.

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What are trace fossils?

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Trace fossils are not remains of the organism itself but rather evidence of its activity, such as footprints or burrows.

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What role do water and minerals play in fossil formation?

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Water can carry minerals that fill in the spaces of an organism's remains, helping to create a fossil.

Front

What is the significance of fossils in understanding Earth's history?

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Fossils provide important information about past life forms, environments, and the changes that have occurred over time.

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2