
Igneous Geology
Flashcard
•
Science
•
12th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is igneous rock?
Back
Igneous rock is formed from the solidification of molten rock material (magma or lava).
2.
FLASHCARD QUESTION
Front
What is the difference between intrusive and extrusive igneous rocks?
Back
Intrusive igneous rocks crystallize below the Earth's surface, while extrusive igneous rocks crystallize at or above the surface.
3.
FLASHCARD QUESTION
Front
What is viscosity in the context of magma?
Back
Viscosity refers to the resistance of a fluid to flow. Low viscosity magma flows easily, while high viscosity magma is thick and flows slowly.
4.
FLASHCARD QUESTION
Front
What type of crystals do quickly cooled igneous rocks have?
Back
Quickly cooled igneous rocks typically have small crystals due to rapid solidification.
5.
FLASHCARD QUESTION
Front
What is the light/dark rule in igneous rocks?
Back
The light/dark rule refers to the color of minerals in igneous rocks, where light-colored rocks are typically felsic and dark-colored rocks are mafic.
6.
FLASHCARD QUESTION
Front
What are mafic rocks?
Back
Mafic rocks are igneous rocks that are rich in magnesium and iron, typically dark in color.
7.
FLASHCARD QUESTION
Front
What are felsic rocks?
Back
Felsic rocks are igneous rocks that are rich in silica and aluminum, typically light in color.
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