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Magma Definition

Magma is molten rock within Earth. For example, it becomes extrusive rocks after a volcanic eruption.

View Lesson on Rocks & Minerals (Including Rock Cycle)
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Rocks & Minerals (Including Rock Cycle)

LESSON MATERIALSmove

Fun Facts

  • Magma cools below Earth's surface to form igneous rocks.
  • Metamorphic rocks typically form at plate boundaries and next to intrusions of magma.
  • When metamorphic rock is pushed deeper into Earth, it melts to form magma.

Why Do We Need To Know About Magma

Learning about magma helps us understand how igneous rocks are made and why they’re important for building things. Igneous rocks come from magma that cools down, and they’re really strong. This shows why magma is important for making things. Magma also helps us learn about the Earth’s crust.

When magma cools down, it also makes valuable stuff like quartz, which is used in electronics, and metals like aluminum and copper that are important for making many things. People who work in geology and mineralogy study these materials, which shows how important magma is for technology, building, and science.

Frequently Asked Questions

How are rocks and minerals different?
Minerals are solid, naturally formed substances that always have the same composition and the same properties. Rocks are made of minerals.
How do crystals form?
Hot water dissolves minerals. When the water evaporates, it leaves behind the dissolved minerals in a crystal structure.
Describe three ways rocks make our lives easier.
Gabbro is a type of rock used to make roads; granite is used in building materials; coal is used to generate electricity; and shale is used to make bricks.
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