Igneous Rocks

Name this igneous rock.

• Granite

• Gabbro

• Basalt

• Rhyolite

Which igneous rock characterisic tell us this rock formed on the surface of Earth?

• It's felsic

• It has air bubbles

• It has large mineral grains

• It's mafic

The rock shown has a _________ texture.

• porphrytic

• fine-grained

• coarse-grained

• glassy

The rocks in Volcanoes National Park Hawaii are forming as the hot lava coming out of the volcanoes cools. These rocks are definitely...

• Intrusive

• Extrusive

• Coarse-grained

• Made from sediments

Tags

NGSS.MS-ESS2-2

The rocks in Yosemite National Park are made out of granite, which tells us they are...

• Extrusive

• Fine-grained

• Intrusive

• Really young and just formed

How can you tell the difference between extrusive and intrusive igneous rocks?

• extrusive rocks have larger crystals

• intrusive rocks have larger crystals

• intrusive rocks are darker in color

• extrusive rocks are darker in color

What is the relationship between crystal size and cooling time ?

• slower cooling = smaller crystals

• faster cooling = larger crystals

• slower cooling = larger crystals

• faster cooling = more crystals

This rock would be considered _______________ in color.

• Felsic

• Mafic

• Intermediate

• Ultramafic

This rock would be considered _________ in color.

• Felsic

• Mafic

• Intermediate

• Ultramafic

This rock has large crystals surrounded by a fine-grained texture. What name do scientists give to explain this type of texture?

• Coarse-grained

• Porphyritic

• Glassy