Show:
Vocabulary
Vocab and etc.
Identifying rocks
Miscellaneous
Miscellaneous
100
define felsic
What is light colored rocks that are rich in elements like aluminum, potassium, silicon, or sodium
100
define Extrusive igneous rocks
What is rocks that cool above ground giving them little time to grow crystals
100
Is granite, a dark colored rock, felsic or mafic?
What is mafic
100
If a rock has no grains, then it is ) ____ grained
What is fine
100
If a rock cools rapidly and forms no crystals, what is the resulting texture?
What is no grain/glassy
200
define mafic
What is dark colored rocks that are rich in calcium, iron, magnesium, and are poor in silicon
200

Molten rock inside the crust is called

What is magma?

200

Is granite (a rock with many grains), course grained (large crystals) or fine grained (small crystals)?

What is coarse grained (large crystals)

200
How, based on the size of a rock's crystals, can you see if a rock is intrusive or extrusive? Explain.
What is when a rock is intrusive it has more crystals because it cools slowly and vice versa
200
If a rock cools rapidly and forms a few crystals, what is the resulting texture?
What is fine grained
300
define coarse grained
What is takes longer to cool, giving minerals more time to grow
300
Magma is a mixture of many_________.
What is minerals
300
Is obsidian (a rock with no grains), most likely intrusive or extrusive?
What is extrusive
300
Why are igneous rocks good for making tools?
What is they are hard, dense, and durable.
300
What is the most common extrusive igneous rock? Where is it found?
What is basalt. It is found in oceanic crusts, lava plateaus, and shield volcanoes.
400
define fine grained
What is cools quickly with little to no crystals
400

How does magma form- give 2 ways:

What is 1)When a rock is heated, or when pressure is released 2) the rock changes composition

400

If a rock is light colored, then it is ______.

What is felsic - igneous rocks rich in silicon, oxygen, sodium

400

Igneous rocks are formed by the cooling of these two things

What is Magma and Lava?

400
What is the most common intrusive igneous rock? Where is it found?
What is granite. It is found in the core of mountain ranges.
500
define Intrusive igneous rocks
What is a rock that cools underground and that allows more crystals to form
500
Igneous rock began as ______ or _____.
What is magma or lava
500

If a rock is dark colored, then it is _____.

What is MAFIC - igneous rocks rich in magnesium and iron.

500

If a rock cools slowly underneath the crust, what is the resulting crystal size?

What is large crystals

500

The size of the crystals in igneous rocks are determined by

What is the rate of cooling of the magma?