Identifying Igneous, Sedimentary, and Metamorphic Rocks

What is the primary way igneous rocks are formed?

• From the crystallization of magma

• From the compression of sediments

• From the precipitation of minerals in water

• From the transformation of existing rocks under heat and pressure

Which characteristic helps determine if an igneous rock is intrusive or extrusive?

• Shape

• Weight

• Grain size

• Color

What mineral is typically black and not transparent in igneous rocks?

• Quartz

• Mica

• Biotite

• Feldspar

Which igneous rock is glassy and very smooth in texture?

• Basalt

• Granite

• Obsidian

• Rhyolite

How are sedimentary rocks formed?

• By the compression and cementation of sediments

• By the crystallization of magma

• By the transformation of existing rocks under heat and pressure

• By the precipitation of minerals in water

Tags

NGSS.MS-ESS1-4

What type of sedimentary rock is made of very fine mineral grains and has a layered structure?

• Breccia

• Shale

• Conglomerate

• Sandstone

Which sedimentary rock is made of smooth pebbles?

• Sandstone

• Breccia

• Conglomerate

• Shale

What is marble formed from?

• Sandstone

• Shale

• Limestone

• Granite

Which metamorphic rock has a banded appearance due to the alignment of minerals?

• Marble

• Schist

• Slate

• Gneiss

What is anthracite formed from?

• Shale

• Limestone

• Bituminous coal

• Sandstone

Tags

NGSS.MS-ESS2-1