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, minerals, or bits of plants and animals
What is sediments
100
This is how metamorphic rocks are created.
What is 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
This type of sedimentary rock is formed through the precipitation on minerals from water, or evaporation of water
What is chemical sedimentary rock
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 are made of
minerals, sediments, organic matter
300
This type of igneous rocks has holes formed from gas bubbles when it rapidly cooled. It is used to scrape off dead skin as well.
Pumice
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 is used to make countertops.
What is granite
400
This type of sedimentary rock you can find fossils in.
What is an organic sedimentary rock
400
A metamorphic rock arranged in layers is called
What is foliated
400
Name two things that have to happen to transform a metamorphic rock into a sedimentary rock.
uplift, weathering and erosion
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
This type of sedimentary rock is composed of fragments and pebbles of minerals and other types of rock.
What is clastic.
500
Limestone is an example of a _______________ rock
What is organic / biologic sedimentary
500
How are rocks and minerals different?
Rocks are mixtures of organic materials, minerals, and sediments. Minerals are inorganic, have a distinct chemical composition, occur naturally, and a crystal structure.