Classification of Rocks

Classification of Rocks

Open Ended

What are the three types of rocks?

Multiple Select

What are the three groups of sedimentary rocks?

• clastic

• classic

• chemical

• biochemical

• mecahnical

Multiple Choice

Clastic rocks are formed from preexisting rocks.

• true

• false

Multiple Choice

What is the difference between conglomerates and breccia?

• how big their parts are

• whether they are rounded or angular

• where they are found

• what color they are

• none of the answers are correct

Multiple Choice

Sandstone and siltstone have the same size clasts.

• true

• false

Multiple Choice

Which has the SMALLEST clasts?

• breccia

• shale

• sandstone

• conglomerate

• siltstone

Fill in the Blank

Chemical rocks are rocks that form when they _________ from water.

Multiple Choice

Biochemical rocks are alive.

• true

• false

Multiple Choice

Which features of sedimentary rocks help scientists learn more about where and when a rock was formed?

• strata

• mud cracks

• ripples

• fossils

• all of the answers are correct

Fill in the Blank

Metamorphic rocks are classified based on their _______.

Multiple Choice

Which type of metamorphic rock has bands or stripes?

• foliated

• nonfoliated

• both foliated and nonfoliated

• none of the answers are correct

Multiple Select

What two features are used to classify igneous rocks?

• pressure

• heat

• texture

• composition

• none of the answers are correct

Multiple Choice

Coarse-grained rocks have smaller crystals.

• true

• false

Fill in the Blank

A rock that doesn't have time for the crystals to form could develop a ______ texture.

Multiple Choice

A rock that was cooling beneath the surface and is suddenly brought to the surface will probably have what kind of texture?

• coarse-grained

• fine-grained

• glassy

• porphyritic

• none of the answers are correct

Multiple Choice

Which rock has at least 45% magnesium and iron-rich materials?

• granitic

• basaltic

• andesitic

• porphyritic

• none of the answers are correct