Classifying Rocks

Geologists might recognize a metamorphic rock by distorted, wavy layers because they were caused by -

• compaction and cementation.

• melting and crystallizing.

• erosion and deposition.

• pressure and heat.

Igneous and sedimentary rocks could each be changed into metamorphic rock if they are changed by -

• weathering.

• pressure.

• organisms.

• cementation.

Rock formed above ground with lava

• Sedimentary Rock

• Extrusive Igneous Rock

• Intrusive Igneous Rock

• Metamorphic Rock

Rock formed by heat and pressure underground

• Sedimentary Rock

• Extrusive Igneous Rock

• Intrusive Igneous Rock

• Metamorphic Rock

Only rock that contains fossils

• Sedimentary Rock

• Extrusive Igneous Rock

• Intrusive Igneous Rock

• Metamorphic Rock

Tags

NGSS.MS-ESS2-3

Rock with smooth, glassy surface

• Sedimentary Rock

• Extrusive Igneous Rock

• Intrusive Igneous Rock

• Metamorphic Rock

Rock formed below ground by magma

• Sedimentary Rock

• Extrusive Igneous Rock

• Intrusive Igneous Rock

• Metamorphic Rock

Tags

NGSS.MS-ESS2-1

May have holes or bubbles in the rock

• Sedimentary Rock

• Extrusive Igneous Rock

• Intrusive Igneous Rock

• Metamorphic Rock

May have bands or ribbons

• Sedimentary Rock

• Extrusive Igneous Rock

• Intrusive Igneous Rock

• Metamorphic Rock

Has large visible crystals

• Sedimentary Rock

• Extrusive Igneous Rock

• Intrusive Igneous Rock

• Metamorphic Rock