Geologic History of Earth Review

Front

What is an igneous intrusion?

Back

An igneous intrusion is a body of igneous rock that forms when magma cools and solidifies beneath the Earth's surface.

Front

What caused the extinction of the dinosaurs?

Back

An asteroid impact is widely believed to have caused the extinction of the dinosaurs.

Front

In which era do we live now?

Back

We live in the Cenozoic era.

Front

What is a fossil?

Back

A fossil is any physical evidence of a plant or animal that lived long ago.

Front

What happens to the amount of daughter material as the parent material decreases?

Back

As the amount of parent material decreases, the amount of new daughter material increases.

Front

What is the geological time scale?

Back

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

Front

What are the three main types of rocks?

Back

The three main types of rocks are igneous, sedimentary, and metamorphic.

Front

What is sedimentary rock?

Back

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

Front

What is the principle of superposition?

Back

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

Front

What is a fault in geology?

Back

A fault is a fracture or zone of fractures between two blocks of rock.