Igneous Rocks and Their Formations

What is the primary mineral composition of granite?

• Quartz and feldspar

• Magnesium and iron

• Silicon and calcium

• Carbon and oxygen

Which of the following is an example of a plutonic landform?

• Cinder cone

• Lava plateau

• Batholith

• Volcanic cone

What type of rock is basalt?

• Metamorphic rock

• Sedimentary rock

• Extrusive igneous rock

• Intrusive igneous rock

How does scoria form?

• From the compression of volcanic ash

• From the rapid cooling of lava with gas bubbles

• From the slow cooling of magma

• From the crystallization of minerals in water

What is the texture of porphyritic rocks?

• Fine-grained

• Glassy

• Coarse-grained

• Mixed large and small crystals