Evolution/Geologic Time

Front

What is natural selection?

Back

Natural selection is the process by which individuals that are better adapted to their environment are more likely to survive and reproduce.

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What does the law of superposition state?

Back

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

Front

What is evolution?

Back

Evolution is the gradual change in species over time through processes such as natural selection and genetic drift.

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What is half-life?

Back

Half-life is the length of time required for half of the radioactive atoms in a sample to decay.

Front

What does the Law of Superposition help determine?

Back

The Law of Superposition helps determine the relative age of rock layers.

Front

What is competition in the context of evolution?

Back

Competition refers to the struggle between organisms for limited resources such as food, space, and mates.

Front

What is variation in a population?

Back

Variation refers to the differences in traits among individuals in a population, which can affect their survival and reproduction.

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What is adaptation?

Back

Adaptation is a trait that enhances an organism's ability to survive and reproduce in its environment.

Front

What is the significance of fossils in understanding evolution?

Back

Fossils provide evidence of past life forms and show how species have changed over time.

Front

What is relative dating?

Back

Relative dating is a method used to determine the age of rocks and fossils in relation to one another, without determining their exact age.