Fossils and Earth's past

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What is a fossil?

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A fossil is the preserved remains or traces of an organism that lived in the past.

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How do fossils help scientists understand Earth's history?

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Fossils provide evidence of how life has changed over time and help scientists reconstruct past environments.

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What is a mold in terms of fossils?

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A mold is a cavity in a rock that forms when an organism decays, leaving an impression.

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What is a cast in terms of fossils?

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A cast is a fossil that forms when a mold is filled with minerals or other materials.

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Who was Alfred Wegener?

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Alfred Wegener was a climate scientist known for proposing the theory of continental drift.

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What is the principle of superposition?

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The principle 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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What is relative dating in geology?

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Relative dating is a method used to determine the age of rocks and fossils by comparing them to other rocks and fossils.

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What is absolute dating?

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Absolute dating is a method used to determine the actual age of a rock or fossil using techniques like radiometric dating.

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What are original remains?

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Original remains are the actual preserved parts of an organism, such as bones, teeth, or soft tissues.

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What is the significance of the fossil record?

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The fossil record provides a historical record of life on Earth and shows how species have evolved over time.