Classifying Rocks
A natural, solid mixture of minerals and grains.
A rock
It is called this when it is on Earth's surface and something else when it is under the Earth's surface.
(comes from volcano)
Lava when on Earth's surface and magma when it is under Earth's Surface.
What is sediment?
These small pieces (rocks, plants, animal organisms) that break off of the earth because of wind and water erosion.
quartzite, marble, slate
Geologists classify rocks into these 3 major groups.
What are igneous, sedimentary, and metamorphic rocks?
The type of rock that forms from magma or lava cooling is called this.
Igneous rock
What are the crystals like in an extrusive rock?
Small or impossible to see with the human eye
Name two examples of sedimentary rocks.
Sandstone, shale, limestone, conglomerate
What does MORPH mean?
To undergo transformation or change.
A rock transforms to sediment by these two processes.
What are weathering and erosion?
This type of rock forms from sediments being compacted and cemented together.
Sedimentary
Igneous rock that formed from magma and cooled very slowly UNDERNEATH the earth's surface.
Intrusive
Name two characteristics of sedimentary rocks.
Chunks of sediment, fine grains, layers, fossils
How do metamorphic rocks form?
They are sedimentary or igneous rocks that are near magma and get heat from it and pressure from layers above.
DAILY DOUBLE!!! I have a sedimentary but then extreme heat and pressure are applied to it. What type of rock will it change into?
A metamorphic rock
This type of rock needs heat and pressure to form.
Metamorphic Rock
How is an EXTRUSIVE igneous rock formed?
From lava ON the earth's surface.
DAILY DOUBLE !!! Sedimentary rocks usually have crystals? T or F?
False
BLACK HOLE QUESTION ... lose 100 pts
bummer.
I have a metamorphic rock that melts, then cools and crystallizes. What type of rock will it turn into?
Igneous Rock
What is the word for something that has many air spaces in between the particles?
Porous
This igneous rock is very light, has holes in it, and can float in water.
Pumice
How do sedimentary rocks form?
The sediment falls to the bottom of the ocean, and is cemented together over 1000s of years.
What would have to happen to a metaphoric rock in order for it to change into sedimentary rock?
Weathering and erosion
Black hole question! Lose 100 pts.
so lame.