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15
×
Why do the crystals in basalt appear so small?
The lava cools quickly, so the crystals don’t have time to grow.
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banana
Go to last place!
Oops!
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rocket
Go to first place!
Okay!
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fairy
Take points!
5
10
15
20
25
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thief
Give points!
5
10
15
20
25
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seesaw
Swap points!
Oops!
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rocket
Go to first place!
Okay!
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fairy
Take points!
5
10
15
20
25
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banana
Go to last place!
Oops!
15
×
What is an intrusive igneous rock?
A rock that forms when magma cools slowly inside the Earth's crust.
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15
×
What is an extrusive igneous rock?
A rock that forms when lava cools on the Earth's surface.
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heart
Other team wins 15 points!
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gold
Win 50 points!
Okay!
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gift
Win 20 points!
Okay!
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baam
Lose 10 points!
Oops!
15
×
Why does granite have different colors?
It contains different minerals like quartz, feldspar, and mica.
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What is the most important characteristic of all igneous rocks?
They are crystalline (made of crystals).
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What does the word "igneous" mean?
It means "fire." Igneous rocks come from magma that has cooled into solid rock.
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15
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What are igneous rocks made of?
Minerals, such as silica, oxygen, aluminum, magnesium, and iron.
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What process occurs when magma cools and turns into a solid?
Solidification.
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15
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Give an example of an intrusive igneous rock.
Granite.
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eraser
Reset score!
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rocket
Go to first place!
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shark
Other team loses 20 points!
Okay!
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lifesaver
Give 25 points!
Oops!
15
×
Why can’t we see the crystals in some igneous rocks with the naked eye?
Because they are too small due to rapid cooling.
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15
×
What is quartz made of?
Silica and oxygen.
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15
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What happens when rocks above intrusive igneous rocks wear away?
The intrusive rock (e.g., granite) appears at the surface.
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