#070 Flashcardizz Review for Evolutionary History Unit Test

Front

What is the principle of superposition in geology?

Back

In geology, the principle of superposition states that in any undisturbed sequence of rocks, the oldest layers are at the bottom and the youngest layers are at the top.

Front

What is a true form fossil?

Back

A true form fossil is a fossil that preserves the actual remains of an organism, such as bones, shells, or leaves.

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What is a mold fossil?

Back

A mold fossil is a mark or cavity made in sediment in the shape of a shell or other body, which can later be filled to form a cast fossil.

Front

What is a cast fossil?

Back

A cast fossil is formed when sediments fill a mold and harden, creating a replica of the original organism.

Front

What is a trace fossil?

Back

A trace fossil is a type of fossil that provides evidence of the activity of ancient organisms, such as footprints, burrows, or feces.

Front

What is the first step in the fossilization process?

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The first step in the fossilization process is that a plant or animal must die and decompose.

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Why are fossils important for understanding evolutionary history?

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Fossils provide evidence of past life forms and their changes over time, helping scientists understand the process of evolution.

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What does it mean when we say fossils have been found all over Earth?

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It means that fossils have been discovered in various locations around the world, indicating that life existed in diverse environments.

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What is sediment in the context of fossil formation?

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Sediment refers to particles of soil, sand, and other materials that accumulate and can cover remains of organisms, aiding in fossilization.

Front

What role do earthquakes play in fossil formation?

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Earthquakes can shift land and expose layers of sediment, which may contain fossils, but they are not a necessary step in the fossilization process.