What are the characteristics and types of igneous rocks?
Understand the Problem
The question seems to ask about the characteristics of igneous rocks, specifically their formation and types. Key concepts include the definitions and processes related to extrusive and intrusive igneous rocks.
Answer
Igneous rocks form by cooling magma, classified as extrusive or intrusive.
Igneous rocks are formed from cooled magma and are classified into extrusive and intrusive types. Extrusive rocks like basalt form from lava cooling quickly on the surface, resulting in fine grains. Intrusive rocks like granite form from magma cooling slowly below the surface, creating coarse grains.
Answer for screen readers
Igneous rocks are formed from cooled magma and are classified into extrusive and intrusive types. Extrusive rocks like basalt form from lava cooling quickly on the surface, resulting in fine grains. Intrusive rocks like granite form from magma cooling slowly below the surface, creating coarse grains.
More Information
Igneous rocks vary based on where they solidify. The texture and grain size reflect their cooling history, affecting their mineral composition and use.
Tips
A common mistake is confusing extrusive with intrusive rocks due to the similar names. Remember: 'extrusive' cools quickly on the surface, while 'intrusive' cools slowly underground.
Sources
- Igneous Rocks - Definition, Characteristics, Types, Examples & Uses - byjus.com
- Igneous rock | Characteristics, Examples, Formation, & Types - britannica.com
- Igneous Rocks; Formation, Characteristics & Types - The Geo Room - thegeoroom.co.zw
