Magmatism Quiz for Grade 11 Students

What is the main difference between mafic and felsic magma?

• Temperature difference

• Color difference

• Viscosity difference

• Silica content

How are igneous rocks formed?

• Through erosion and weathering of existing rocks.

• Through the evaporation of water.

• Through the solidification and cooling of magma or lava.

• By the compression of sedimentary rocks.

Which type of volcanic eruption is characterized by a violent explosion?

• Vesuvian eruption

• Plinian eruption

• Hawaiian eruption

• Strombolian eruption

What is the major difference between intrusive and extrusive igneous rocks?

• Formation location

• Mineral composition

• Texture

• Color

What is the primary component of magma?

• Gaseous mineral material

• Molten rock material

• Liquid metal material

• Solid rock material

What is the process called when magma cools and solidifies?

• Solidification

• Liquefaction

• Vaporization

• Crystallization

Which type of magma has the highest silica content?

• Basaltic magma

• Andesitic magma

• Rhyolitic magma

• Granitic magma

What type of igneous rock is formed from lava cooling on the Earth's surface?

• Intrusive igneous rock

• Sedimentary rock

• Metamorphic rock

• Extrusive igneous rock

What is the texture of intrusive igneous rocks?

• Fine-grained

• Coarse-grained

• Glassy

• Smooth-grained

What is the texture of extrusive igneous rocks?

• Smooth

• Soft

• Coarse-grained

• Fine-grained