Unit 2 Lesson 4: Three Classes of Rock

Front

What type of rock has wavy bands?

Back

Metamorphic rock.

Front

Which class of rock forms when rocks are transformed by intense heat and pressure?

Back

Metamorphic.

Front

What is a sedimentary rock formed when rock fragments are squeezed together called?

Back

Clastic.

Front

What type of rock forms where the remains of plants and animals are deposited in layers?

Back

Organic.

Front

Which type of igneous rock has small or no crystals due to rapid cooling?

Back

Extrusive igneous.

Front

What are the three main classes of rocks?

Back

Igneous, sedimentary, and metamorphic.

Front

What is the process called when sediments are compacted and cemented together?

Back

Lithification.

Front

What type of rock is formed from cooled magma beneath the Earth's surface?

Back

Intrusive igneous.

Front

What is the main characteristic of sedimentary rocks?

Back

They are formed from the accumulation of sediments.

Front

What is the term for the process of breaking down rocks into smaller pieces?

Back

Weathering.