Show:
Wind/Solar
Geothermal
Biomass/Hydro
Alternative Fuels
100

How do people with solar power maintain electricity through the night?

It is stored in batteries

100

What do geothermal energy plants require that is at risk of being polluted?

Groundwater

100

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.

100

What do hyrodgen fuel cells emit?

Water vapor and heat

200
What happens to excess electricity generated by wind turbines?

It is stored in batteries.

200

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.

200

What are the benefits of hydropower?

-Clean

-Low Cost to Operate

-Controls Flooding

-Relatively constant power

200

What is the benefit of burning ethanol compared to gasoline?

Produces fewer air pollutants.

300

Wind turbines can be installed vertically and horizontally. True or false?

True!

300

What makes geothermal a better choice than a solar farm?

Doesn't need large tracts of land.

300
Which of the following is NOT a pollutant released by burning Biomass:


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.

300

Explain the energy conversion in hydrogen fuel cells.

Hydrogen combines with oxygen, producing water, heat, and energy.

400

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

400

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

400

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

400

What is the biggest disadvantage of hydrogen fuel cells?

There is no source of hydrogen on Earth.