The Age of Earth's Rocks Lesson 1 Unit 2 Mod.F

Front

What is the law of superposition?

Back

The scientific law that states in horizontal sedimentary rock layers, the oldest layers are at the bottom and the youngest layers are at the top.

Front

What can fossils tell us about rock layers?

Back

Fossils can be used to determine the relative ages of rock layers, indicating which layers are older or younger.

Front

Which layer is the youngest according to the law of superposition?

Back

The youngest layer is the one at the top of the sequence.

Front

What is the significance of Layer #6 in a geological diagram?

Back

Layer #6 is where animal E first showed up, indicating its presence in that specific time period.

Front

What are sedimentary rocks?

Back

Sedimentary rocks are types of rocks formed by the accumulation and compaction of mineral and organic particles.

Front

What does relative age mean?

Back

Relative age refers to the age of a rock layer compared to other layers, rather than an exact age.

Front

What is an index fossil?

Back

An index fossil is a fossil that is used to define and identify a particular time period in the geological time scale.

Front

How do scientists determine the age of rocks?

Back

Scientists determine the age of rocks using methods like radiometric dating and studying the layers of rock.

Front

What is a geological time scale?

Back

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

Front

What is the difference between absolute age and relative age?

Back

Absolute age is the exact age of a rock or fossil, while relative age is its age compared to other rocks or fossils.