8.1 Rocks and
Rock Types
Rock Types
What are the three main types of rocks?
sedimentary, igneous, metamorphic
What is intrusive rock?
Igneous rock that forms underground.
Solid material that settles is called ___.
sediment
Metamorphic rocks are classified as _______ or _______.
foliated and unfoliated
What is required for a rock to become magma?
Which type of rock is formed from melted minerals?
igneous rock
What is the hot, liquid rock inside of the earth?
magma
Name the 3 types of sedimentary rocks.
clastic, chemical, and organic
You can see "bands" in which type of metamorphic rock?
foliated
rock cycle
Which type of rock is formed by heat, pressure, and chemical reactions?
metamorphic rock
What is extrusive rock?
Igneous rock that forms on the earth's surface
Shale and conglomerate are two types of _______ rocks.
clastic
Deep in the earth, ____ and ______ are needed to squeeze, bend, and twist rock.
heat and pressure
How can sedimentary rock change into metamorphic rock?
burial, heat, and pressure
Which type of rock is formed from pieces of other rock and organic matter pressed together?
sedimentary rock
Igneous rocks are classified based on whether they form _____ or _______ the earth's surface.
above, below
Rock salt is an example of a ______ rock.
chemical
foliated - slate, schist, gneiss
nonfoliated - limestone, sandstone, marble
Name two ways that rocks on the earth's surface are changed.
*broken down by forces of wind, water, living things, and gravity
*sediment is carried, often by water, and deposited
Rocks are solid mixtures of _______.
minerals
Name a common intrusive rock and an extrusive rock.
Intrusive - granite
Extrusive - baslat, obsidian
What is the most common type of sedimentary rock?
clastic
Metamorphic rock that does not show bands
How can metamorphic rock turn into igneous rock?
melts into magma and then cools and hardens into igneous rock