The process in which an existing rock is changed by heat or pressure or both.
What is metamorphism?
100
A sedimentary rock that forms near the surface. It can be buried deeper as blocks of the crust push together.
What is shale?
100
The process of one rock changing into another type of rock is called.
What is metamorphism?
100
Develops when rocks are under pressure.
What is foliated rock?
100
A volcano with a small amount of silica creates what type of landscape.
What is a plateau?
200
Heat and pressure can break the bonds that join atoms in minerals. Then the atoms can join together differently as new bonds form.
What is recrystallization?
200
Shale changes to this rock as pressure causes the minerals to line up in layers. Mica starts to grow as recrystallization begins.
What is slate?
200
Many of the metamorphic rocks people use were once this.
What is igneous rock?
200
Metamorphic rocks that do not show foliation are called this.
What is nonfoliated rocks?
200
This rock forms from the remains of ancient plants.
What is coal?
300
The arrangement of minerals within rocks into flat or wavy parallel bands.
What is foliation?
300
Slate changes to this rock deeper in the crust, where the temperature and pressure are higher. This rock is shiny because more mice has grown.
What is phyllite?
300
Many of the metamorphic rocks people use were once this.
What is sedimentary rocks?
300
Phyllite is this.
What is foliated?
300
This rock forms from no minerals and doesn't have a definite chemical make up, it's made of natural glass.
What is obsidian?
400
Materials that settle out of water or air. In addition to loose pieces of rocks and minerals, pieces of plant and animal remains can also make up this "this."
What is sediment?
400
At even higher temperature and pressure, phyllite changes to this rock. As recrystallization increases, completely new types of minerals replace older ones.
What is schist?
400
Out of the five rocks shown in the picture on page 97, the rock that is the deepest in the Earth is this.
What is gneiss?
400
Marble is this.
What is nonfoliated?
400
This rock forms from only one mineral called calcite.
What is limestone?
500
Molten rock that cools on Earth's surface forms this rock type. Examples are rhyolite, pumice, and basalt.
What is extrusive igneous rock?
500
Deep within the crust, schist changes to this rock. During resrystallization, light and dark minerals separate into bands. Changes are so great that all traces of the original shale are gone.
What is gneiss?
500
Metamorphic changes occur over these types of areas.
What is large and small areas?
500
A foliated rock has these.
What is parallel wavy or straight lines?
500
One use for rocks is the building of houses and this.