Layers of Earth
Trees and Forests
Soil
Rocks
Mining
100
Which compositional layer of the Earth is the thinnest?
What is the crust?
100
A tree removal method in which all trees are cut at once
What is clear-cutting?
100
The top level of a soil horizon
What is the O horizon?
100
An inorganic rock with a solid, crystalline structure
What is a mineral?
100
A mining method in which topsoil is blasted from the top of a mountain to reveal a resource
What is "mountaintop removal"?
200
How is the outer core different than the inner core?
What is the outer core is liquid and the inner core is solid?
200
This is a term for forests that have never been logged.
What is old-growth forest?
200
List 3 main soil particles in order of increasing particle size
What is clay, silt, sand
200
A process by which rocks are heated, cooled, melted and weathered
What is the rock cycle?
200
A process in which a large hole is dug to expose ore and unwanted rock surrounding the ore for mining purposes
What is "open-pit" mining?
300
Going from inner layer to outer layer, name the 3 compositional layers.
What is the core, the mantle, and the crust?
300
What are two negative effects of deforestation?
What are (any two): -increased CO2 in the atmosphere -loss of CO2 absorption -loss of habitat -soil degradation -erosion
300
Soil with a relatively even mixture of the three particle sizes is known as __________.
What is loam?
300
Two processes needed for metamorphic rock formation are:
What are heat and pressure?
300
The amount of an ore on earth that can currently be mined
What is a mineral RESERVE?
400
The Earth's core is made up of mainly two elements, name them.
What are nickel and iron?
400
The percentage of earth's land covered by forests.
What is 30%?
400
A continuous mass of solid rock that makes up earth's crust and forms the bottom of a soil horizon.
What is bedrock?
400
Rock formed by cooling magma
What is igneous rock?
400
After ore separation, the concentrated waste products are called: __________
What are tailings?
500
Describe a divergent boundary.
What is, when the plates separate?
500
Forests resulting from the regrowth of trees that were cut at different times, as with selection systems
What are uneven-aged forests?
500
Soil is a complex substance formed through ___________, _____________, and ____________. (need 2 of the 3 main processes for credit)
What are: weathering/erosion, deposition, and decomposition?
500
Limestone is a type of __________________ rock
What is sedimentary?
500
SMELTING is the process of: ______________
What is: -Heating ore and combining it with other ore? -processing mined materials with harsh chemicals to separate the ore from non-ore?
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