Post on 21-Dec-2015
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A valuable mineral deposit is located just below the surface of the ground. Which method would be used to obtain the mineral?
____________________________
Strip mining
The area of land that supplies water to a river system is called
a(n)____________________________
watershed
Using land to grow food crops is an example of____________________________.
agriculture
What is eutrophication?
Over many years, the levels of nutrients in a lake build up in this
process.
This is an example of how human activities may harm the balance in an ecosystem?
Desertification, urbanization, deforestation
.Which indoor air pollutant is a colorless, odorless gas that forms when wood, coal, oil,
or gas are incompletely burned?
ChlorofluorocarbonsCFC’S
One of the acids in acid rain forms when water combines with________.
NITROGEN OR SULPHUR OXIDES
What is a major role of technology in controlling air pollution?
Reducing emissions
A well in which groundwater rises because of pressure is called a(n)_____.
Artesian well
The process of restoring an area of land to a more natural, productive state is called ______________________
Land reclamation
. The water in ponds and lakes is
still
A river system is made up of a river and its____.
tributaries
Water moves easily through __________materials.
permeable
People can obtain groundwater by drilling a well _________.
Into an aquifer
An aquifer is a(n)
Underground layer of rock or sediment that holds water.
The streams and small rivers that feed into a main river are called
tributaries
The type of molecule that is the major cause of the ozone hole and blocks the ozone cycle is called____.
chlorofluorocarbons
Farmers may leave fields unplanted or plant alternate crops to reduce
Nutrient depletion
A(n) _____ is a dangerous weather condition in which a layer of warm air traps smog close to Earth's surface.
Temperature inversion
Many uses of land, including logging, mining, and farming, expose the soil, which can lead to_______.
erosion
The small lake that forms when a loop of a river is cut off from the main channel is called a(n) _______.
Oxbow lake
People may not have enough water during a(n) ___________________, a period when rainfall is below normal.
drought
Building a highway is an example of the type of land use known as ____________________.
development
.Scientists think deforestation is one cause of ______, because carbon dioxide increases when people burn trees to clear land.
Global warming
A radioactive gas that is naturally formed by certain types of rocks underground is called _________.
radon
A river and all of its tributaries make up a(n) ___________.
River system
The main chemical in photochemical smog is _____, which forms when sunlight reacts with certain gases.
ozone
The top of the saturated zone is called the _____.
Water table
The area of soil in which the pores are totally filled with water is called the _______ zone.
saturated
People cannot use most of the freshwater on Earth because it is in the form of ___________.
ice