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magma holes
magma chambers
volcanoes
Correct!
Magma chambers are holding spaces for magma, which is found within the crust, often under mountains and volcanoes. When the magma cools, granite is formed.
Definition: a rock that forms when magma cools deep in the Earth's crust
Type: igneous
Appearance: typically light and dark speckles, with large crystals
Primary minerals: feldspar, quartz, and mica
Cool fact: Built in the second century B.C. and still standing today, the Great Wall of China is made of granite and other rocks.
Granite forms in pockets of magma miles below the Earth's surface called:
Granite can have very large crystals. That's because when it formed, the magma:
cooled slowly
cooled quickly
never cooled
Correct!
Granite has large grains because the magma cooled slowly. This allows crystals to grow very big.
Granite is always gray.
Fact
OR
Fiction
?
Fiction
Granite is often speckled with dark and light colored minerals, and comes in a variety of colors like gray, pink, blue, green, and purple.
The Earth's continental crust is made of granite.
Fact
OR
Fiction
?
Fact
Granite makes up most of the continental crust, while another igneous rock called basalt makes up the oceanic crust.
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Granite forms when igneous rock cools deep within the Earth. The slower it cools, the larger its mineral size. Pegmatitic granite has minerals as big as 10 meters (33 feet) wide!
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Christine Tappen, Earth scientist