Planet Earth Unit 3 Lesson 7 Investigating Rock Strata Retest

Front

What is the oldest layer in a rock outcrop?

Back

The oldest layer is typically found at the bottom of the outcrop.

Front

What does the Geologic Time Scale represent?

Back

The Geologic Time Scale is a record of the known history of rocks and fossils.

Front

In which type of rock are fossils most commonly found?

Back

Fossils are most commonly found in sedimentary rock.

Front

How do you determine the order of rock layers from oldest to youngest?

Back

The order of rock layers can be determined by their position, with the oldest layers at the bottom and the youngest at the top.

Front

What is the principle of superposition in geology?

Back

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

Front

What is a fossil?

Back

A fossil is the preserved remains or traces of ancient organisms.

Front

What type of rock forms from the cooling and solidification of magma or lava?

Back

Igneous rock forms from the cooling and solidification of magma or lava.

Front

What is sedimentary rock?

Back

Sedimentary rock is formed from the accumulation and compaction of mineral and organic particles.

Front

What is the significance of fossils in sedimentary rock layers?

Back

Fossils help scientists understand the history of life and the age of the rock layers.

Front

What does it mean if a fossil is found in a higher layer than another fossil?

Back

It generally means that the fossil in the higher layer is younger than the fossil in the lower layer.