Igneous Rocks Quiz

How are igneous rocks primarily formed?

• Through metamorphism

• Through solidification of molten rocks

• Through erosion

• Through sedimentation

What is the texture of rocks that have many pits from gas escape?

• Glassy texture

• Vesicular texture

• Porphyritic texture

• Crystalline texture

What happens to molten rocks when they reach the surface of the earth?

• They cool and solidify

• They explode

• They evaporate

• They remain liquid

What is the primary process involved in the formation of igneous rocks?

• Compaction

• Metamorphism

• Solidification

• Erosion

Which of the following is NOT a characteristic of igneous rocks?

• Can have different textures

• Formed from magma or lava

• Contains fossils

• Formed from solidification

What is the primary component of magma?

• Iron

• Carbon

• Silica

• Water

Which of the following statements is true about igneous rocks?

• They do not contain minerals

• They are always crystalline

• They can form from both magma and lava

• They are formed from sediments

Which of the following is an example of an igneous rock?

• Limestone

• Shale

• Sandstone

• Granite

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

• Metamorphic rock

• Extrusive igneous rock

• Sedimentary rock

• Intrusive igneous rock

What type of igneous rock is formed from magma that cools slowly beneath the Earth's surface?

• Extrusive igneous rock

• Intrusive igneous rock

• Sedimentary rock

• Metamorphic rock