Cluster of wind turbines in a windy area on land or at sea, built to capture wind energy and convert it into electrical energy.
What is Wind Farm
100
Heat stored in soil, underground rocks, and fluids in the earth's mantle.
What is Geothermal Energy
100
consists of plant materials (such as wood and agricultural waste) and animal wastes that can be burned directly as a solid fuel or converted into gasses or liquids
What are Biofuels
100
The measure of how much work we can get from each unit of energy we use.
What is Energy Efficiency
200
Solar energy can be converted directly into electrical energy by this
What are Photovoltaic Cells
200
Average efficiency of a wind turbine
What is 80%
200
country that gets 99% of its electricity from hydropower?
What is Norway
200
Major household appliances are ranked according to their energy efficiency. Only those that are the most efficient can carry this label.
What is Energy Star
200
A decrease in energy use based primarily on reducing unnecessary waste of energy.
What is Energy Conservation
300
Advantages of solar energy (must provide at least 2 answers)
What is free energy, quick installation, no emissions, low land disturbance, moderate one time cost.
300
this country is the world's largest producer of wind power and manufacturer of wind turbines
What is Denmark
300
Pros of Hydropower (2 Examples)
What is moderate to high net energy, high efficiency, low-cost electricity, long life span, No CO2 emissions during operation, may provide flood ctrl below dam, provides water for yr-round irrigation
300
Ethanol is made from this
What is sugar and grain crops
300
saves energy and money by using combined heat and power systems. In such a system, two useful forms of energy (such as steam and electricity) are produced from the same fuel source.
What is cogeneration
400
percentage of the worlds commercial energy that solar (and wind) power provide
What is 1%
400
Advantages of wind power
What is moderate to high net efficiency, High efficiency, Moderate capital cost, Low electric cost (and falling), Very low environmental impact, No CO2 emissions, Quick construction
400
example of large tidal energy facility?
What is Rance estuary in France, Bay of Fundy in Canada
400
60% methane, 40% CO2 produced from biomass by bacteria
What is biogas
500
difference between a passive and an active solar heating system
What is Active requires energy input to operate fans and pumps
500
Disadvantages of using wind energy
What is high initial cost, maintenance, minor noise pollution, bird hazard
500
Average efficiency of a hydropower plant
What is 85-90%
500
Percentage of energy produced in the US by biomass fuels
What is 9%
500
percentage of all commercial energy in the United States that is wasted