Classifying Rocks
Igneous Rocks
Sedimentary Rocks
Metamorphic Rocks
The Rock Cycle
100
Geologists classify rocks into 3 major groups
What is igneous, sedimentary, and metamorphic
100
Igneous rock that formed from magma and cooled very slowly UNDERNEATH the earth's surface is called ________.
What is intrusive rock
100
These small rock pieces or particles make up sedimentary rock. They can be other rocks or plant and animal organisms
What is sediments
100
How are metamorphic rocks created?
Extreme heat and pressure
100
What is the FIRST process that forms sedimentary rock
What is weathering
200
The type of rock that forms from magma or lava cooling
What is igneous rock
200
This type of igneous rock is formed from lava ON the earth's surface.
What is extrusive rock
200
When small sediments get "glued" together.
What is cementing
200
What types of rocks can become metamorphic rocks
What is igneous, sedimentary and other metamorphic rocks (ANY)
200
Igneous rock transform to sediment by processes called ___________ & ____________
What is weathering and erosion
300
What rocks and made of
Minerals
300
Why do igneous rocks sometimes form holes?
As the lava cools, gas bubbles get trapped inside.
300
Sedimentary rocks can form from sediments that have settled out of wind or water, a process called
Deposition
300
Where do metamorphic rocks form
Deep underground
300
The layers of sediment become pressed together over time
What is compaction
400
95% of earth's crust is made out of this type of rock.
Igneous
400
This type of igneous rock tends to form crystals.
Intrusive igneous rock
400
In creasing wave action at a beach will...?
Increase the amount of sand.
400
A metamorphic rock arranged in layers is called
What is foliated
400
The force that drives the rock cycle
What is plate tectonics
500
What is the name of this igneous rock?
Obsidian
500
How do crystals form in igneous rocks?
By magma cooling. The faster it cools, the smaller the crystals. The longer it takes to cool, the larger the crystals. Crystals form from the amount of minerals in the rock.
500
Why do beaches have different colored sand?
The sand comes from different colored rocks that were weathered down.
500
What happens to metamorphic rock if it gets pushed too deep into the earth?
It melts and becomes magma instead.
500
What science is the study of rocks called?
Geology