Minerals
What are the building blocks of rocks?
Minerals
Explain why andesite and diorite can both have the same percentage of mineral composition by volume, and yet be two different igneous rocks.
Dioxide cooled slower.
What are sedimentary rocks made of?
Sediments
What types of rocks can become metamorphic rocks?
Igneous, Sedimentary, or Metamorphic
True or False: Color is a good test of a mineral
False
What property describes the way light reflects off the surface of a mineral?
Luster
What does vesicular mean?
Holes/gas pockets
Rocks that are formed from evaporation and precipitation.
Crystalline/Evaporite
What factors cause rocks to metamorphose?
Heat and pressure
Which rock shows mineral banding?
Gneiss
What is the color of the powder left behind by minerals called?
Streak
The color, density, and composition of Diabase.
Dark color, High density, Mafic compositon
A rock that is composed of grains that are .0003cm or smaller.
Shale
Which metamorphic rock will bubble with acid?
Marble
Which rock is usually glassy, nonvesicular, and has a felsic composition?
Obsidian
What is the name of the property that refers to a mineral’s ability to scratch another mineral?
Hardness
What is the relative cooling time of an extrusive rock?
Fast
What causes layers of sediment to become a rock?
Compaction and Cementation
What type of metamorphism will cause the greatest degree of metamorphism?
Regional
Which types of rocks are the only ones that contain fossils?
Sedimentary
What is cleavage?
A mineral breaking along flat planes
What minerals are present in a sample of rhyolite?
Potassium feldspar, quartz, plagioclase feldspar, biotite, amphibole
What sedimentary rock will bubble with acid?
Limestone
Where does contact metamorphism occur?
On the edges of an intrusion
What mineral has the element lead in its composition?
Galena (PbS)