Igneous Rock

Is this igneous rock, obsidian, fine-grained or coarse-grained?

• fine-grained

• coarse-grained

Rhyolite is a fine-grained, extrusive, igneous rock. How did it form?

• rapidly cooling lava

• slowly cooling magma

Pegmatite is a coarse-grained, intrusive, igneous rock. How did it form?

• rapidly cooling lava

• slowly cooling magma

Basalt is an extrusive igneous rock. What does this tell you about it?

• it was formed from lava that erupted onto Earth's surface

• it was formed from slowly cooling magma

• it was formed from magma that hardened beneath Earth's surface

Diorite is an intrusive igneous rock. What does this tell you about it?

• it was formed from lava that erupted onto Earth's surface

• it was formed from magma that hardened beneath Earth's surface

• it was formed from rapidly cooling lava

Which type of rock is formed from the solidification of magma or lava?

• igneous

• sedimentary

• metamorphic

• bioclastic

Fine-grained igneous rocks with small crystals formed from

• rapidly cooling lava

• slowly cooling magma

Coarse-grained igneous rocks with large crystals formed from

• rapidly cooling lava

• slow cooling magma

Coarse or Fine?

• coarse

• fine

Rocks that are formed from magma or lava are called

• sedimentary

• metamorphic

• igneous

• clastic

Tags

NGSS.MS-ESS2-2