Igneous Rocks Quiz

What type of igneous rock is granite?

• Extrusive (Volcanic)

• Intrusive (Plutonic)

• Sedimentary

• Metamorphic

What is the texture of basalt?

• Coarse-grained (Phaneritic)

• Fine-grained (Aphanitic)

• Glassy

• Porphyritic

Which minerals are granite rich in?

• Pyroxene and plagioclase feldspar

• Quartz and feldspar

• Olivine and amphibole

• Calcite and dolomite

What is basalt commonly used for?

• Countertops and building facades

• Jewelry and ornaments

• Ocean floor and Earth's surface

• Sculptures and statues

What type of rock is Obsidian?

• Intrusive (Plutonic)

• Extrusive (Volcanic)

• Sedimentary

• Metamorphic

What is the texture of Pumice?

• Glassy

• Vesicular

• Coarse-grained

• Fine-grained

Which rock is known for having a smooth, glassy appearance?

• Granite

• Basalt

• Obsidian

• Limestone

What makes Pumice lightweight enough to float on water?

• High silica content

• Numerous vesicles (gas bubbles)

• Dense mineral composition

• Smooth texture

What type of rock is Gabbro?

• Extrusive (Volcanic)

• Intrusive (Plutonic)

• Sedimentary

• Metamorphic

What is the texture of Diorite?

• Fine-grained (Aphanitic)

• Glassy

• Coarse-grained (Phaneritic)

• Porphyritic