Identifying Igneous Rocks Quiz: Challenge Your Geology Skills

  • NGSS-ESS2
  • NGSS-ESS3
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| Attempts: 955 | Questions: 6 | Updated: Oct 28, 2025
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1. Match the following: Magma and lava both refer to molten rock-which one is intrusive and which one is extrusive?
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About This Quiz
Identifying Igneous Rocks Quiz: Challenge Your Geology Skills - Quiz

Test your knowledge with our igneous rocks quiz! This quiz will help you understand the key characteristics of igneous rocks, including how they form, their texture, and their mineral composition. Whether you're a geology student or a rock enthusiast, this quiz will reinforce your understanding of these fascinating rocks that... see moreform from cooled and solidified magma or lava.

If you're looking for more detailed practice, take the identifying igneous rocks quiz. This quiz focuses on recognizing and classifying different types of igneous rocks, including intrusive and extrusive varieties. It will test your skills in identifying rocks like granite, basalt, and pumice, and help you understand the processes behind their formation. see less

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2. True or false: Intrusive igneous rocks are formed above the earth's surface.

Explanation

Intrusive igneous rocks are formed below the earth's surface. They are formed when magma cools and solidifies slowly beneath the surface, allowing for the growth of large mineral crystals. This slow cooling process gives intrusive rocks their characteristic coarse-grained texture. Examples of intrusive igneous rocks include granite and diorite.

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3. Extrusive igneous rocks are characterized by ___________________ crystal size.

Explanation

Extrusive igneous rocks are formed from lava that cools quickly on the Earth's surface. The rapid cooling prevents the crystals from growing large, resulting in small crystal size.

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4. Please fill answer below: Intrusive igneous rocks are characterized by _____________ crystal size.

Explanation

Intrusive igneous rocks are formed when magma cools and solidifies beneath the Earth's surface. Due to the slow cooling process, these rocks have a longer period of time for the crystals to grow, resulting in larger crystal sizes. Therefore, intrusive igneous rocks are characterized by large crystal size.

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5. Check as many as apply: Mafic minerals include:

Explanation

Mafic minerals are a group of minerals that are rich in magnesium and iron. Pyroxene and olivine are both examples of mafic minerals. Pyroxene is a group of dark-colored minerals that are commonly found in igneous and metamorphic rocks. Olivine is a green mineral that is often found in basaltic rocks. Plagioclase feldspar, muscovite mica, and quartz are not mafic minerals as they do not contain high amounts of magnesium and iron.

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6. Match the texture with its definition
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Match the following: Magma and lava both refer to molten rock-which...
True or false: Intrusive igneous rocks are formed above the...
Extrusive igneous rocks are characterized by ___________________...
Please fill answer below: Intrusive igneous rocks are characterized by...
Check as many as apply: Mafic minerals include:
Match the texture with its definition
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