What is the main characteristic of igneous rocks?
igneous rocks

Flashcard
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Science
•
8th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Igneous rocks are formed from the cooling and solidification of molten rock material (magma or lava).
2.
FLASHCARD QUESTION
Front
What are the two main types of igneous rocks?
Back
Extrusive and Intrusive igneous rocks.
3.
FLASHCARD QUESTION
Front
What is an extrusive igneous rock?
Back
An extrusive igneous rock is formed from lava that cools and solidifies on the Earth's surface.
4.
FLASHCARD QUESTION
Front
What is an intrusive igneous rock?
Back
An intrusive igneous rock is formed from magma that cools and solidifies beneath the Earth's surface.
5.
FLASHCARD QUESTION
Front
How does the cooling rate of magma affect the texture of igneous rocks?
Back
Faster cooling results in smaller crystals (fine-grained texture), while slower cooling allows for larger crystals (coarse-grained texture).
6.
FLASHCARD QUESTION
Front
What does the color of an igneous rock indicate?
Back
The color of an igneous rock indicates its composition, particularly the silica content.
7.
FLASHCARD QUESTION
Front
What type of igneous rock is typically darker in color?
Back
Basalt is an example of a darker-colored igneous rock, which has low silica content.
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