Types of Rocks

What are igneous rocks formed from?

• The cooling and hardening of magma.

• The compression of sand and mud.

• The accumulation of plant material.

• The evaporation of water.

Tags

NGSS.MS-ESS2-1

Which type of igneous rock forms underground from cooled magma?

• Plutonic (intrusive)

• Volcanic (extrusive)

• Sedimentary

• Metamorphic

Which type of igneous rock forms on the surface when lava cools after erupting?

• Volcanic (extrusive)

• Plutonic (intrusive)

• Sedimentary

• Metamorphic

What determines the size of crystals in an igneous rock?

• Determined by how fast the magma hardens.

• The color of the magma.

• The type of rock surrounding the magma.

• The altitude at which the rock forms.

Tags

NGSS.MS-PS1-4

Name the three types of igneous rock composition.

• Felsic, Intermediate, Mafic

• Granite, Basalt, Andesite

• Intrusive, Extrusive, Hypabyssal

• Sedimentary, Metamorphic, Igneous

The four types of textures in igneous rocks are:

• Coarse Grained, Fine Grained, Porphyritic, Glassy

• Granular, Foliated, Non-foliated, Glassy

• Clastic, Chemical, Organic, Bioclastic

• Metallic, Non-metallic, Vitreous, Earthy

Metamorphic rocks are formed when _______ rocks are buried deep within the earth and tremendous heat, pressure, and chemical reactions change them into new types of rocks.

• preexisting

• igneous

• sedimentary

• volcanic

Contact metamorphism occurs when rocks are altered by:

• intense pressure from tectonic movements

• heat from nearby magma or lava

• chemical reactions with water

• erosion and weathering processes

Metamorphic rocks are classified as either:

• foliated or non-foliated

• regional or foliated

• non-foliated or original

• pressure or dynamic

An _____ _______ is a mineral that is used to define the metamorphic grade of a rock.

• hydrothermal mineral

• new mineral

• index mineral

• folded mineral