Igneous
What are igneous rocks formed from?
Cooling and solidification of magma or lava
How do sedimentary rocks form?
From compacted and cemented sediments
What causes metamorphic rocks to form?
Heat and pressure
What is the rock cycle?
The process that shows how rocks change from one type to another
What color is Mrs. Condie's Guitar?
Blue
What is the difference between intrusive and extrusive igneous rocks?
Intrusive forms inside Earth, extrusive forms on the surface
What are sediments?
Small pieces of rock, mineral, or organic material
What does “metamorphic” mean?
“Changed form”
What process changes rock into sediment?
Weathering and erosion
Which rock type is most likely to contain fossils?
Sedimentary
Name one example of an igneous rock.
Granite, obsidian, pumice
Name one example of a sedimentary rock.
Sandstone, limestone, shale
Name one example of a metamorphic rock.
Marble, slate, gneiss
What process changes sediments into sedimentary rock?
Compaction and cementation
What is Mrs. Condie's dog's name?
Moxie
What do the size of crystals in an igneous rock tell you?
How quickly it cooled (slow = large crystals, fast = small crystals)
What is one way sediments can be transported?
By wind, water, ice, or gravity
What type of rock can metamorphic rocks form from?
Any rock type (igneous, sedimentary, or metamorphic)
What two things are needed to form metamorphic rock?
Heat and pressure
You lose a point if you stand up...
What classroom number is Mrs. Condie's?
301
What type of igneous rock forms from volcanic ash or pumice?
Extrusive igneous rock
What is it called when sedimentary rocks start to stick together?
Cementation
Why don’t metamorphic rocks usually contain fossils?
Because the heat and pressure that form them destroy fossils.
Can a metamorphic rock become an igneous rock? How?
Yes, if it melts and then cools again
Why are the rocks we see younger than we know the earth is?
They go through the cycle again before they can get that old.