Rock Identification

Front

What type of rock is formed from volcanic activity and has very small crystals?

Back

Igneous rock.

Front

What are the characteristics of extrusive igneous rocks?

Back

They have small crystals, may contain gas holes, and can float in water.

Front

What type of igneous rock is usually light in color and contains small crystals of quartz, feldspar, hornblende, and mica?

Back

Extrusive igneous rock.

Front

What is volcanic ash cemented together called?

Back

Igneous rock.

Front

What type of rock is formed from the alteration of existing rocks due to heat and pressure?

Back

Metamorphic rock.

Front

What are the three main types of rocks?

Back

Igneous, metamorphic, and sedimentary.

Front

What is the texture of volcanic glass?

Back

Glassy texture with no crystals.

Front

What type of rock comes from granite, conglomerate, and sandstone?

Back

Metamorphic rock.

Front

What is the process called when rocks are formed from the accumulation of sediments?

Back

Sedimentation.

Front

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

Back

Igneous rock.