Rocks Flashcards
(25 cards)
What is a soild mass of minerals or mineral like material?
Rocks
What does NOT have a crystalline structure?
Glass
How many categories of rocks are there?
Three
What are the three different types of rocks?
Igneous, Sedimentary, and Metamorphic
What summarizes how rocks are formed?
The rock cycle
Melted rock underneath the ground is called what?
Magma
Magma that reaches the Earth’s surface is called what?
Lava
These rocks form from cooled magma
Igneous rocks
What is the break down of rocks?
Weathering
What are loose bits of weathered rocks?
Sediment
These rocks form from weathered, eroded, and deposited sediments
Sedimentary rocks
Formed from preexisting rocks that are altered by pressure, heat, and fluids
Metamorphic rocks
Igneous rocks are also sometimes called what?
Volcanic rocks
What are two types of Igneous rocks?
Intrusive and extrusive
Igneous rocks formed from magma beneath Earth’s surface are known as?
Intrusive Igneous rocks
Igneous rocks formed from magma above or on Earth’s surface are known as?
Extrusive Igneous rocks
What two things are used to classify an Igneous rock?
Texture and composition
A rocks what describes the size, shape, and arrangement of its parts?
Texture
Geologists estimate that __ to __ percent of the outer 10 miles of the Earth’s crust is either ___ or ___ rock.
Geologists estimate that 90 to 95 percent of the outer 10 miles of the Earth’s crust is either Igneous or Metamorphic rock.
What is the picking up and carrying away of sediment?
Erosion
What is the process that squeezes or compacts sediments?
Compaction
Sedimentary rocks are classified into these three groups:
Clastic, Chemical, and Biochemical
The agents of Metamorphism are..
Temp, pressure, and fluids.
Metamorphic rocks are classified as having either..
Foilated or non-foilated texture.
