Rock Layers (Geologic Time)

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What is absolute dating?

Back

A method used by scientists to determine the exact age of an object or rock layer.

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In which era did dinosaurs live?

Back

Mesozoic era.

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What does the geologic time scale represent?

Back

Earth's 4.6 billion year history.

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What is weathering?

Back

The process of breaking down rocks into smaller pieces.

Front

Who studies the composition of the Earth, including rock layers?

Back

A geologist.

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What is relative dating?

Back

A method used to determine the age of rocks or fossils in relation to other rocks or fossils.

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What are fossils?

Back

Remains or traces of ancient organisms preserved in rock.

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What is erosion?

Back

The process by which soil and rock are removed from one location and transported to another.

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What is the Paleozoic era known for?

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The era when many marine life forms and the first land plants appeared.

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What is the Cenozoic era?

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The most recent geological era, known as the age of mammals.