GEOG1280 Midterm 2 Flashcards
Fossil Fuel
an energy source formed from the residue of plants and animal buried millions of years ago.
The threee principal fossil fuels:
coal, petroleum, and natural gas
Before the widespread use of fossil fuels, the most important source of energy was
biomass
Renewable resource
produce in nature more rapidly than it is consumed by humans (infinite)
Nonrenewable resource
produced in nature more slowly than it is consumed by humans (finite)
Supply
the quantity of something that producers have available for sale
Demand
the quantity that people wish to consume of energy are in developed countries
Demand for energy in the United States comes from four main sources:
Industry (daily factories), Transportation, Homes, Services
China has recently surpassed the United States as the world leader for
the overall consumption of energy
Distribution of coal
because of drifting continents, todays main reserves of coal are in mid-latitude countries rather than in the tropics
Why is coal typically found at mid-latitudes and not evenly distributed across the globe?
Coal was formed in the tropical regions a long time ago and relocated to the mid-latitudes due to continental drift.
Organization of the Petroleum Exporting Countries (OPEC)
made for more control on oil prices
Proven reserve
the supply of energy remaining in deposits that have been discovered (last 54 years)
Potential reserve
the supply in deposits that are undiscovered but thought to exist (last 110 years)
Which four nations have the largest proven reserves of coal?
China, Russia, Australia, and the United States
Hydraulic fracturing
which involves pumping a lot of water at high pressure into the ground to further break apart rocks and thereby release more trapped gas
Nuclear Power
10% of the world’s electricity, nonrenewable, viewed as an alternative to fossil fuels
The countries that are most dependent upon nuclear power are clustered in
Europe
Serious challenges nuclear power presents
Radioactive waste, nuclear weapons, and accidents
Biomass fuel
derived from burning wood, plant material, and animal waste directly or converting them charcoal, alcohol, or methane gas
Hydroelectric power
generating electricity from the movement of water
The second most popular source of energy
Hydro-electric
Hydris benefits and drawbacks
benefits:
-renewable, a lot less pollution
drawbacks:
-expensive to build, aquatic ecosystem can be affected along with life, soil erosion, relocating people due to floods, overuse of water in areas that require water
Geothermal energy
energy from hot water or steam
Where is an optimal location to generate geothermal energy?
plate boundaries where volcanism is present
Solar energy currently generates
around 3 percent of the world’s electricity
Passive solar energy system
collects energy without the use of mechanical devices
Active solar energy system
collects solar radiation through the use of mechanical devices and converts the solar radiation either to heat energy or to electricity
Photovoltaic cells
in a direct active solar energy system, solar radiation is collected through these cells
Air pollution
concentration of trace substances at a greater level than occurs in average air
Photochemical smog
in the presence of sunlight, hydrocarbons, as well as nitrogen oxides
Acid deposition
at the regional scale, air pollution may damage a region’s vegetation and water supply
Acid precipitation
sulfur oxides and nirogen oxides, emitted by burning fossil fuels, enter the atmosphere, and lead to this
Ozone
a gas that absorbs ultraviolet radiation in the stratosphere
Chlorofluorocarbons (CFCs)
Earth’s protective ozone layer is threatened by manufactured chemicals
Greenhouse effect
The increase in Earth’s temperature, caused by carbon dioxide trapping some of the radiation emitted by the surface
Nonconsumptive
if the water is returned to nature as a liquid
Consumptive
if the water is evaporated
Biochemical Oxygen Demand (BOD)
constituted by the oxygen consumed by the decomposing organic wate
Point Source Pollution
enters a body of water at a specific location
Nonpoint Source Pollution
comes from a large, diffuse area
The average American produces how many pounds of solid waste per day?
5 pounds
The most common strategy for solid waste disposal in the United States is
burial in a sanitary landfill
Recycling
the separation, collection, processing , marketing and reuse of the unwanted material.
Remanufacturing
the rebuilding of a product to specifications of the original manufactured product using a combination of reused, repaired, and new parts
What European nation is a leader in recycling, with almost 67% of all solid waste recycled?
Germany
Recycling is carried out in four principal ways
Curbside programs, drop-off centers, buy-back centres, and deposit programs