Kinds of Rocks

Kinds of Rocks

by Deborah Dubinsky

​Kinds of Rocks

​Vocabulary

​Conglomerate: A rock made up of several different materials, such as a rock made up of different kinds of rounded pebbles.

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Igneous: Formed by great heat or actions of volcanoes.

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Metamorphic: Description of something that has changed form; a rock that has changed from one form to another.

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Sedimentary: Rocks formed as the result of eroded rock particles or minerals settling out of water.siltVery fine mineral particles.

​Three TYPES OF ROCKS

​​Sedimentary: a rock that is formed by weathering, erosion, and deposition

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​Igneous: a rock formed from rapidly cooling magma

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Metamorphic: a rock that has been changed from one form to another by heat and pressure

​Sedimentary Rock

• ​Forms in layers

• ​Formed by erosion, weathering, and deposition

• ​​Shale: made of very tiny grains of clay

• ​​​Sandstone: contains larger grains of sand (quartz)

• ​​Conglomerate: large pebbles, cobbles, or boulders (near rivers)

• ​Limestone is formed from a dissolved mineral, calcite (lime).

Multiple Choice

Most sedimentary rocks form:

• large crystals

• small crystals

• layers

• stalagmites

Multiple Choice

Most sandstone is made of:

• quartz crystals

• silt grains

• clay material

• calcite

Multiple Choice

Which of the following is a sedimentary rock?

• basalt

• granite

• quartzite

• limestone

Multiple Choice

Conglomerate rocks usually form:

• in deserts

• in forests

• on beaches

• near rivers

​Igneous Rock

• Formed by heat and pressure

• ​​Granite is a course-grained light colored rock which usually contains large crystals of quartz, feldspar, and mica.

• ​Basalt is a dark, fine-grained rock which has few or no crystals large enough to see

Multiple Choice

Which of the following is an igneous rock?

• slate

• limestone

• calcite

• basalt

​Metamorphic Rock

• ​When heat and pressure cause a rock to change from one form into another.

• ​Both igneous and sedimentary rocks can be changed to metamorphic rock.

• ​Marble: was once limestone.

• ​Slate: was formed from shale.

• ​Quartzite consists of nearly pure quartz

Multiple Choice

Which of the following is a metamorphic rock?

• marble

• quartz

• shale

• sandstone

Multiple Choice

The breakdown of rocks by chemical action of air and water is called:

• ersion

• weathering

• disintegration

• layering

Multiple Choice

What is the relationship of rocks to soil?

• Soil produce rocks.

• Soil is made of small rocks.

• Rocks produce soil.

• Rocks make up soils.