Explain how are igneous rocks formed?
Understand the Problem
This appears to be a textbook page about rocks and minerals, specifically focusing on igneous rocks and how they are formed. There is no specific question that the student is asking.
Answer
Igneous rocks are formed from the cooling and solidification of magma (or lava).
Igneous rocks are formed from magma. Magma comes out of the Earth through volcanic eruptions. The magma that reaches the surface is called lava. The cooling and solidification of this lava forms igneous rocks.
Answer for screen readers
Igneous rocks are formed from magma. Magma comes out of the Earth through volcanic eruptions. The magma that reaches the surface is called lava. The cooling and solidification of this lava forms igneous rocks.
More Information
Igneous rocks can be divided into two categories: intrusive and extrusive. Intrusive rocks cool slowly beneath the Earth's surface, while extrusive rocks cool rapidly on the surface.
Tips
A common mistake is thinking all igneous rocks are the same. The rate of cooling affects the crystal size, with slow cooling resulting in larger crystals.
Sources
- Igneous Rocks - National Geographic Education - education.nationalgeographic.org
- What are igneous rocks? - USGS - usgs.gov
- Igneous Rocks: How Are They Formed? - Universe Today - universetoday.com
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