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35 Cards in this Set
- Front
- Back
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Energy sources that can replenish themselves over time are called ....
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renewable energy
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Energy sources that cannot replenish themselves over timea are called ....
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non-renewable energy
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The type of energy that is made from the ancient remains of dead plants & other organisms is called....
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fossil fuel
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Three types of fossil fuel are ____, ____, and ____.
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coal
oil natural gas |
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Solid fossil fuel from the remains of dead plants is called....
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coal
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The majority of the energy in this country comes from ....
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coal
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Electricity is made by spinning a coil of wires inside a....
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magnetic field
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Since we can't effectively store electricity, then as soon as it's made it must be....
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used
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Devices that make electricity by spinning a coil of wires in a magnetic field is called a....
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generator
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The top two pollutants that come from burning coal are ____ and _____.
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sulfur dioxide
Mercury |
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Anthracite coal is more expensive than the softer bituminous coal because...
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anthracite contains less sulfur
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When sulfur (from burning coal) mixes with water, the water becomes....
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acidic (hence acid rain)
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Oil in tar sands and in oil shale requires a lot of processing and expenditure of energy. Therefore, those energy sources are very.....
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inefficient
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Mercury from coal smoke gets in the water and comes back to us as it moves up the ____ chain
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food
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Nuclear energy involves the splitting of Uranium atoms to release huge amount of energy. We call this process....
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fission
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We have not promoted nuclear energy so much over the last few decades because of ...
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Three Mile Island and Chernobyl
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Nuclear energy is so costly and inefficient because....
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it requires so many steps to get it from the ground to electricity in your home.
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The more steps it takes to process and deliver energy, the more ____ that energy is.
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inefficient
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According to the Second Law of Thermodynamics, some energy is always ____ in very energy transfer.
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wasted or lost, usually as heat
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Except during the building of a nuclear power plant, nuclear power has ___ carbon dioxide emissions.
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no
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When nuclear fuel is "spent", a major problem that arises is....
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what to do with the waste fuel. It is so radioactive, it must be shielded far away from anyone for a long time.
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Energy cannot be ....
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recycled
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Solar cells that make electricity are called...
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PV or photovoltatic cells
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When light hits silicon wafers, _____ are released, which create an electric current.
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electrons
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A major problem with wind and solar energy is that...
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the wind doesn't always blow and the sun doesn't always shine
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Wind energy can provide all our electricity needs if we install the turbines, but a big reason that we haven't done so is....
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we don't have transmission lines from the wide-expanse of remote places to get the electricity to population centers.
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Hydroelectric power is nothing more than ____ flowing _____ ans spinning a ____ attached to a generator.
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water
downhill turbine |
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A major problem with hydroelectric dams is...
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they disturb ecosystems upstream and downstream;
stop sediment flow; |
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When steam from deep underground is used to spin turbogenerators, we call it...
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geothermal energy
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Water can be split into ____ and ___ using electricity in process called water electrolysis.
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oxygen and hydrogen
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Hydrogen and oxygen can be recombined and made to burn in an _____ to make a car run.
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engine
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Hydrogen and oxygen can also be recombined in a ___ ____ to make electricity, which the opposite of electrolysis.
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fuel cell
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Examples of biofuels include....
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wood, garbage, waste agricultural products, waste oil, ethanol, cow manure methane
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Electricity that is generated by moving turbines by the flow of the incoming and outgoing tides is called....
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tidal energy
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A key to making our energy go farther is by....
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conservation
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