Formation of Igneous Rocks Quiz

What is the primary process that forms igneous rocks?

• Erosion

• Cooling and hardening of magma

• Sedimentation

• Metamorphism

What are extrusive igneous rocks?

• Rocks formed when magma hardens beneath the Earth's surface

• Rocks formed when lava hardens on the surface

• Rocks formed from sediment compaction

• Rocks formed from evaporated minerals

What process forms intrusive igneous rocks?

• Magma hardening beneath the surface

• Lava cooling on the surface

• Sediment compaction

• Mineral evaporation

What is magma?

• Molten material that forms deep beneath the Earth's surface

• Molten rock that has reached the Earth's surface

• Solid rock found in the Earth's crust

• Water that has evaporated from the Earth's surface

What is the effect of slow cooling on the texture of igneous rocks?

• Fine-grained

• Coarse-grained

• No texture

• Mixed texture

Tags

NGSS.MS-PS1-4

What is the relationship between cooling rate and crystal size in igneous rocks?

• Faster cooling, larger crystals

• Slower cooling, larger crystals

• Faster cooling, no crystals

• Slower cooling, no crystals

Which texture is NOT mentioned in the classification of igneous rocks?

• Glassy texture

• Porphyritic texture

• Smooth texture

• Granitic texture

What is the main characteristic of a glassy texture in igneous rocks?

• Coarse grains

• Fine grains

• No visible grains

• Mixed grains

Which composition is not primarily made of silicate minerals?

• Basaltic composition

• Andesitic composition

• Ultramafic composition

• Granitic composition

Tags

NGSS.MS-ESS3-1

What type of minerals are found in ultramafic composition rocks?

• Silicate minerals

• Iron and magnesium-rich minerals

• Light-colored minerals

• Plagioclase feldspar

Tags

NGSS.MS-ESS2-1