Wind/Solar
How do people with solar power maintain electricity through the night?
It is stored in batteries
What do geothermal energy plants require that is at risk of being polluted?
Groundwater
How does the cost of a biomass powerplant compare to the cost of a coal-fired power plant?
Biomass operational cost are very high compared to coal.
What do hyrodgen fuel cells emit?
Water vapor and heat
It is stored in batteries.
How does geothermal energy work in a home?
(Not geothermal power plants)
Geothermal energy uses the natural insulating power of Earth to heat buildings in the winter and cool them in the summer.
What are the benefits of hydropower?
-Clean
-Low Cost to Operate
-Controls Flooding
-Relatively constant power
What is the benefit of burning ethanol compared to gasoline?
Produces fewer air pollutants.
Wind turbines can be installed vertically and horizontally. True or false?
True!
What makes geothermal a better choice than a solar farm?
Doesn't need large tracts of land.
Carbon Dioxide (CO2), Particulate Matter (PM), Carbon Monoxide (CO), Sulfur Dioxide (SO2)
Sulfur Dioxide (SO2)
This is released from the burning of coal. One of the causes of acid rain.
Explain the energy conversion in hydrogen fuel cells.
Hydrogen combines with oxygen, producing water, heat, and energy.
Put the stages of wind energy generation in the correct order.
a) Mechanical Energy
b) Kinetic Energy
c) Electrical Energy
Kinetic Energy --> Mechanical Energy --> Electrical Energy
B, A, C
One recent cost analysis report indicates that electricity from hydroelectric power can be produced for about $0.05 per kWh, while electricity from conventional coal-fired power plants can be produced for an average of about $0.11 per kWh.
Calculate the percent change in the cost of electricity for a typical house resulting from a switch between conventional coal-fired power plants to hydroelectric power
($0.05/kWh - $0.11/kWh)
------------------------------- X 100 = -55%
$0.11/kwh
What are the drawbacks of hydropower?
-It's expensive to build
-It displaces people and wildlife
-It interferes with breeding routes
-It can cause doughts
What is the biggest disadvantage of hydrogen fuel cells?
There is no source of hydrogen on Earth.