In or Out
Rock Textures
Terminology
Igneous Rocks
Trivia
100
Igneous rocks that form above the ground.
What are extrusive rocks?
100
Large crystals represent this texture in a rock.
What are coarse-grained igneous rocks?
100
A rock that is formed under a volcano.
What are intrusive rocks?
100
Obsidian is this kind of rock.
Extrusive igneous rock.
100
A person who studies rocks.
What is a Geologist?
200
Igneous rocks that form below the ground.
What are Intrusive rocks?
200
Rocks with small crystals that are difficult to see
What are fine-grained igneous rocks?
200
A rock that is formed outside a volcano after it has erupted.
What are extrusive rocks?
200
When magma cools slowly, ________ crystals form.
What is large?


200
Igneous rocks can be found around or in these.
What is a volcano?
300

Intrusive rocks usually form from this substance

What is magma?
300
A rock that forms with large crystals
What is an intrusive igneous rock?
300
This is the name given to molten rock that has been expelled from a volcano.
What is lava?
300
When magma cools quickly, _________ crystals form.
What is small?
300
This rock is the most common intrusive rock.
What is granite?
400
Extrusive rocks usually form from this molten rock.
What is lava?
400
Small crystals are formed in this type of rocks.
What are extrusive igneous rocks?
400
This is the name given to molten rock that is still under the volcano.
What is magma?
400
This describes a rock that is rich in feldspars and silica and is generally light in color.
What is a felsic rock?
400
This rock is commonly used to smooth or polish especially for people who have callouses on their hands or feet and will float in the tub.
What is pumice?
500
These are the two types of Igneous rocks
What is extrusive and intrusive?
500
Small crystals form _______ and large crystals form ______.
What is quickly and slowly?
500
A rock that was sediment, then went under pressure, then was melted down, cooled and crystallized inside or outside a volcano.
What is an igneous rock?
500
This describes a  rock that is rich in magnesium and iron that is generally dark in color.
What is a mafic rock?
500
This word is Greek and means "resulting from or produced from fire".
What is Igneous?
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