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What is the relative age of rocks?

Back

The relative age of rocks refers to the age of a rock layer compared to other layers, determining which is older or younger without knowing their exact age.

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What is the law of superposition?

Back

The law of superposition states that in undisturbed horizontal layers of sedimentary rock, the oldest layer is at the bottom and the youngest is at the top.

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What is an index fossil?

Back

An index fossil is a fossil of a widely distributed organism that lived during a geologically short period, used to date and correlate the age of rock layers.

Front

Who proposed the theory of Continental Drift?

Back

Alfred Wegener proposed the theory of Continental Drift, suggesting that continents were once joined together and have since drifted apart.

Front

What is Pangaea?

Back

Pangaea was a supercontinent that existed about 250 million years ago, where all the continents were joined together.

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What does absolute age mean?

Back

Absolute age is the actual age of a rock or fossil, often determined through radiometric dating.

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What is erosion?

Back

Erosion is the process by which rock and soil are worn away and transported by natural forces such as wind or water.

Front

What is an unconformity in geology?

Back

An unconformity is a gap in the geological record that represents a period of erosion or non-deposition.

Front

What is the significance of fossils in determining the relative age of rocks?

Back

Fossils help determine the relative age of rocks by indicating the time period in which the organisms lived, allowing for correlation between rock layers.

Front

What is the difference between relative age and absolute age?

Back

Relative age compares the age of rock layers to one another, while absolute age provides a specific age in years.