Earth History Review 2022-23

Front

What is the process by which fossil bones of a dinosaur are formed?

Back

The dinosaur was covered in sediment.

Front

According to the law of __________, in horizontal sedimentary rock layers the oldest layer is at the bottom and the youngest layer is at the top.

Back

Superposition

Front

What is it called when a variation in a species has a favorable trait that helps it survive, while the less favorable variation dies out?

Back

Natural selection.

Front

What is absolute age?

Back

The exact age of a rock or fossil.

Front

What is an adaptation?

Back

A trait that helps an organism survive its environment.

Front

What is the significance of sediment in fossil formation?

Back

Sediment can cover and preserve remains, leading to fossilization.

Front

Define 'index fossil'.

Back

A fossil that is used to define and identify a particular time period.

Front

What does the term 'geologic time scale' refer to?

Back

A system of chronological dating that relates geological strata to time.

Front

What is the role of natural selection in evolution?

Back

Natural selection is the process where organisms better adapted to their environment tend to survive and produce more offspring.

Front

What is the difference between relative age and absolute age?

Back

Relative age is the age of a rock compared to other rocks, while absolute age is the exact age of a rock.