Earth Science Long Quiz 2.1

Igneous rocks are formed from:

• Weathering

• Compaction

• Cooling of magma/lava

• Fossils

Which is an extrusive igneous rock?

• Granite

• Basalt

• Diorite

• Gabbro

Which igneous rock is glassy and black?

• Granite

• Shale

• Pumice

• Obsidian

Which igneous rock can float on water because of trapped gas holes?

• Diorite

• Pumice

• Marble

• Conglomerate

Which type of igneous rock cools slowly underground?

• Intrusive

• Extrusive

• Metamorphic

• Sedimentary

Which texture is coarse-grained with large crystals?

• Aphanitic

• Phaneritic

• Vesicular

• Porphyritic

Which factor mainly controls the size of crystals?

• Temperature

• Water Content

• Pressure

• Cooling rate

The Latin word ignis means:

• fire

• stone

• earth

• heat

Granite is an example of:

• Extrusive igneous rock

• Intrusive igneous rock

• Foliated metamorphic rock

• clastic sedimentary rock

Which igneous texture shows both large and small crystals?

• Glassy

• Pegmatitic

• Vesicular

• Porphyritic