Igneous
Sedimentary
Metamorphic
Rock Cycle
Clastic and Non-Clastic
100
Igneous rocks are formed when...
magma cools within the Earth. Or when magma comes to the surface (lava), solidifies and cools at the surface.
100
True or False. This is a sedimentary rock. Also, what rock is it?
True. It is limestone.
100
What is a metamorphic rock
Rocks that form as a result of re-crystallization of an igneous, sedimentary, or metamorphic rock driven by intense heat and/or intense pressure.
100
When rocks are affected by weathering and erosion, they change into...
Sediments.
100
What does clastic mean?
A sedimentary rock that contains no organic material.
200
Where are igneous rocks usually found?
They are usually found near volcanoes.
They are usually found near volcanoes because they are formed from magma.
200
How are sedimentary rocks formed?
They can be formed by weathering, erosion, compaction, cementation, and lithification . They can be formed from pre-existing rocks. They can also be chemical formation of evaporates.
200
How are metamorphic rocks formed?
They are formed by heat and pressure.
Contact metamorphism: When magma comes in contact with other rocks in a localized area.
Regional Metamorphism: Occurs in areas with high, intense pressure. Large areas are impacted (not localized).
Compaction: process by which sediments stack on top of one another, applying pressure, closing the space between the sediments.
Cementation: process by which sediments are glued together by minerals that have been deposited by water.
Lithification: combined process of compaction and cementation.
200
When sediment is compacted and cemented, it changes into...
Sedimentary Rock
200
What type of metamorphism occurs in un-localized areas?
Regional Metamorphism
300
How are intrusive rocks formed
They form underground.
They cool slowly, allowing crystals within the rocks to form longer, thus becoming larger.
300
Is this a sedimentary rock? What rock is it?
Yes.
It is sandstone.
300
What does the word metamorphosis mean?
The process in which one thing changes into another.
300
When heat and pressure are applied to a sedimentary rock, it changes into a...
Metaphoric Rock.
300
Is conglomerate coarse grained or fine grained?
It is coarse grained.
It is coarse grained because it has a lot of grains.
400
True or False. This is an igneous rock.
Also, what is this rock called?
True. It is called Obsidian.
It is formed when magma comes to the surface and cools. This happens because the rock is extrusive.
400
What does stratification mean?
Tendency of sedimentary rocks to form in layers called strata.
400
What rock is this? And is it Metamorphic? Is it foliated?
It is Metamorphic and it is Gneiss. This rock had unequal pressure applied.
400
When melting of a metamorphic rock occurs, it changes into...
Magma.
400
Is this rock coarse grained or fine grained?
This rock is fine grained.
This rock is fine grained because it is not grainy.
500
Is Diorite intrusive or extrusive?
Diorite is intrusive.
Diorite is intrusive because they form underground and have bigger crystals.
500
What is the combined process of compaction and cementation?
Lithification.
500
True or False this rock is metamorphic. If so, what rock is it?
True. It is Marble
It is formed when limestone is exposed to high temperatures and pressures.
500
When magma cools down, it turns into an...
Igneous rock.
500
Is this rock coarse grained or fine grained? What rock is it?
It is fine grained. It's siltstone.
It is not grainy, so it is fine grained.