Igneous Rocks

Front

How do extrusive igneous rocks form?

Back

from lava that erupted onto Earth's surface

Front

How do intrusive igneous rocks form?

Back

from magma that hardened beneath Earth's surface

Front

Fine-grained igneous rocks with small crystals formed from

Back

rapidly cooling lava

Front

Coarse-grained igneous rocks with large crystals formed from?

Back

slow cooling magma

Front

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

Back

coarse-grained

Front

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

Back

fine-grained

Front

How did rhyolite, a fine-grained, extrusive, igneous rock, form?

Back

rapidly cooling lava

Front

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

Back

slowly cooling magma

Front

What does it mean if basalt is an extrusive igneous rock?

Back

It was formed from lava that erupted onto Earth's surface.

Front

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

Back

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