Unit 8 Rocks Flashcards
Define Asthenosphere
the top layer of the mantle composed of plastic rock
Define the Crust
The outermost layer of the Earth, composed of solid rocks
What is Magma
molten rock that does not reach the Earth’s surface
What is Lava
molten rock that reaches the earth’s surface.
Define ‘Crystals’
A solid that has a variety of special shapes.
What is Mantle
Layer of the Earth below the crust
What is Minerals
The chemical substances found in rocks.
Contrast the differences between Intrusive and extrusive rocks
Intrusive igneous rocks form below the earth’s surface while extrusive igneous rocks form on the surface of Earth.
Define Physical Weathering
Breakdown of rocks by physical process. No new chemicals added.
Define Chemical Weathering
The physical and chemical process of breaking down of rocks into smaller pieces adding a new substance.
What is a Strata
Layers of sedimentary rock
How are Igneous rocks formed
rocks formed by the cooling of magma
What is a Ore
rocks that contain valuable minerals
What term do you use to define the shininess of a mineral
Lustre
Contrast the extrusive and intrusive igneous rocks
Extrusive igneous rocks are formed at the surface of the earth, and intrusive rocks form below the earth’s surface.
