Rock Characteristics

Intrusive igneous rocks cool slowlybecause they form underground. Because they cool slowly, intrusive igneous rocks have large, sometimes interlocking, crystals that you can see. Which of the following is NOT an intrusive igneous rock?

• Gabbro

• Diorite

• Granite

• Basalt

Intrusive igneous rocks cool slowly because they form underground. Because they cool slowly, intrusive igneous rocks have large, sometimes interlocking, crystals that you can see. Which of the following is an intrusive igneous rock and so will have large crystals?

• Gabbro

• Scoria

• Obsidian

• Andesite

The rock shown is GABBRO. We can tell that it is a(n) ________________________ rock that cooled slowly underground because it has large, visible crystals.

• extrusive igneous

• intrusive igneous

• metamorphic

• sedimentary

The rock shown is GRANITE. We can tell that it is a(n) ________________________ rock that cooled slowly underground because it has large, visible crystals.

• extrusive igneous

• intrusive igneous

• metamorphic

• sedimentary

The rock shown is DIORITE. We can tell that it is a(n) ________________________ rock that cooled slowly underground because it has large, visible crystals.

• extrusive igneous

• intrusive igneous

• metamorphic

• sedimentary

Tags

NGSS.MS-ESS2-1

The rock shown is BASALT. We can tell that it is a(n) ________________________ rock that quickly on the surface of the ground because it has tiny crystals and a fairly uniform texture

• extrusive igneous

• intrusive igneous

• sedimentary

• metamorphic

The rock shown is SCORIA. We can tell that it is a(n) _____________________________ rock that cooled quickly on the surface of the ground because we can still see the holes where bubbles of gas were trapped while the rock cooled rapidly

• extrusive igneous

• intrusive igneous

• metamorphic

• sedimentary

The rock shown is PUMICE, the only known rock that FLOATS on water. We can tell that it is a(n) ___________________________ rock that cooled quickly on the surface of the ground because we can still see the holes where bubbles of gas were trapped while the rock cooled rapidly

• extrusive igneous

• intrusive igneous

• metamorphic

• sedimentary

The rock shown is ANDESITE. We can tell that it is a(n) __________________________ rock that cooled quickly on the surface of the ground because it looks relatively smooth with only tiny crystals.

• extrusive igneous

• intrusive igneous

• metamorphic

• sedimentary

The rock shown is OBSIDIAN. We can tell that it is a(n) ________________________________ rock that cooled quickly on the surface of the ground because it has a smooth, glassy texture.

• extrusive igneous

• intrusive igneous

• metamorphic

• sedimentary