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EXAM STUDY TIME, rocks, minerals, and erosion
unit 4
66
Science
9th Grade
07/28/2009

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Term
What is a mineral?
Definition
A substance with a difinite chemical make up.
Term
What is a mineral made of?
Definition
one or more elements.
Term
What are the two most abundant elements in the earth's crust?
Definition
oxygen and silicon.
Term
How can minerals form?
Definition
1 Cooled lava or magma
2 Evaporation
3 Solubility
4 Compression.
Term
What is a crystal?
Definition
A mineral with a specific geometric shape.
Term
What is a crystalline?
Definition
A mineral that forms too quickly to have a definate shape.
Term
What is minerology?
Definition
The study of minerals and rocks.
Term
Which is more specific, geology or mineralogy?
Definition
Mineralogy.
Term
How do you test a mineral speciman?
Definition
Streak, color, hardness, shine(luster), Splitting(none, 1, 2, or 3 directional.
Term
What are the special properties that some minerals have?
Definition
Magnetic, double refraction, flourescant(under black light), and precious gem.
Term
What is a nonrenewable resource?
Definition
Something that is mined.
Term
What is a renewable resource?
Definition
A substance that can produce more of something.
Term
What is a reserve?
Definition
A deposite of a resource that might be mined some day.
Term
What major mineral resources does our nation possess?
Definition
Iron, copper, potash, aluminum, and lead.
Term
What are diamonds and garnet used for?
Definition
Abrasives.
Term
What is sulfur used for?
Definition
Acids.
Term
What is calcite used for?
Definition
Cement.
Term
What are calcite and gypsum used for?
Definition
Chalk.
Term
What is hamatite used for?
Definition
Iron products.
Term
What is galena used for?
Definition
Lead products.
Term
What is gypsum used for?
Definition
Dry Wall(sheet rock)
Term
What is halite used for?
Definition
table salt.
Term
What is graphite used for?
Definition
Lubricants.
Term
What is found in an ore?
Definition
A metal of importance along with other stuff. To get the metal by itself you must smelt it.
Term
What is a native metal?
Definition
A metal found pure in the ground.
Term
What percent of all the minerals in Earth's crust are members of the silicate family?
Definition
more than 90%
Term
What are the two main elements found in silicates?
Definition
Oxygen and Silicon.
Term
What is the basic crysal strutcure of a silicate?
Definition
A triangle based Egyption pyramid.
Term
What is erosion?
Definition
The movement of the broken down rock.
Term
What are the 9 types of physical weathering?
Definition
Movement of water, freeze-thaw, plant life, wind, gravity on mountains, human activity, animal activity, glaciers, and heating-cooling.
Term
What are the 3 types of chemical weathering?
Definition
Oxidation, hydrolysis, and acid activity.
Term
What is oxidation.
Definition
Oxygen combining with elements to from a weak substance.
Term
What is hydrolysis?
Definition
Water combining with minerals to become mushy clay.
Term
The height of wind born waves depend on what factors?
Definition
wind speed, lenght of time, and fetch.
Term
What is the swash?
Definition
The motion of water up the beach.
Term
What is backwash?
Definition
The water going back down the beach under the wave.
Term
What are the 4 things that can tear down a rocky shoreline?
Definition
Storm waves, Air and water, Sand and pebbles, and seawater.
Term
What are the main elements found in carbonates?
Definition
calcium, carbon, and oxygen.
Term
What is the basic crystal structure of a carbonate.
Definition
rhombic.
Term
What are the two main elements found in sulfides?
Definition
Sulfur and a metal.
Term
What is the basic crystal structure of a sulfide?
Definition
cubic.
Term
What is a rock?
Definition
A substance made of 2 or more minerals.
Term
What are the three families of rock?
Definition
Igneous, Sedimentary, and Metamorphic.
Term
All igneous rocks begin as ___________.
Definition
Magma.
Term
Igneous rocks are classified by their_______ and__________.
Definition
mineral makeup, and %composition.
Term
What is the difference between intrusive and extrusive rock?
Definition
Intrusive form in crust, and extrusive form in the water or air.
Term
What is the difference between Felsic and Mafic rock?
Definition
Felsic rocks are light colored and low in density while Mafic rocks are the opposite.
Term
What are examples, mineral makeup and percent composition of Granite?
Definition
Ex. Obsidian, pumice, rhyolite, and granite.
Makeup: Quartz, feldspars, micas, serpentine and hornblend.
65% or more felsic.
Term
What are examples, mineral makeup and percent composition of Gabbro.
Definition
Ex. Basalt pumice, and gabbro.
Makeup: Quartz, feldspars, micas, serpentine and hornblend.
65% or more mafic.
Term
What is weathering?
Definition
the breakdown of rock.
Term
What is weathering?
Definition
the breakdown of rock.
Term
What is a sea cliff?
Definition
Rock cut away to the high tide level.
Term
What is a sea stack?
Definition
A small island of rocks.
Term
What is a sea arch?
Definition
A sea cave where the walls were cut through.
Term
what is a sea cave?
Definition
A cliff where a notch deepens.
Term
What is a beach?
Definition
The area of shore between the high and low tide levels.
Term
What are sandbars?
Definition
A pile of sand in the middle of a body of water.
Term
What are spits?
Definition
Sandbars that reach the shore.
Term
What is a hook?
Definition
A spit with a curved end.
Term
What are barrier islands?
Definition
Sandbars that form on coasts with straight lines.
Term
What are cusps?
Definition
U shaped beaches found between the mainland and barrier islands.
Term
What is hard water?
Definition
Groundwater that contains large amounts of dissolved minerals, contributed by limestone.
Term
What type of rock will caves form in?
Definition
Limestone.
Term
What is a glacier?
Definition
A large mass of compacted snow and ice that moves under the force of graviy.
Term
What is a cirque?
Definition
the beggining of a glacier, semicircular.
Term
What is an Arête?
Definition
The divide between two glaciers.
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