Exploring Renewable Energy Sources

What is the primary advantage of using solar and wind energy?

• They are always available.

• They do not produce air or water pollution.

• They are the cheapest energy sources.

• They require no maintenance.

Which mineral is commonly used in the batteries for storing solar and wind energy?

• Iron

• Lithium

• Gold

• Silver

What is the main environmental concern associated with wind turbines?

• They consume a lot of water.

• They cause air pollution.

• They can lead to bird deaths.

• They emit carbon dioxide.

What percentage of total electricity generated in the U.S. is accounted for by hydropower?

• 10.5%

• 6.2%

• 15.3%

• 28.7%

What is the main difference between run-of-the-river and water impoundment hydroelectric generation?

• Run-of-the-river uses stored water, while water impoundment does not.

• Water impoundment allows for electricity generation on demand.

• Run-of-the-river is more common than water impoundment.

• Water impoundment has no environmental impact.

Which type of biomass energy is most commonly used in developing countries?

• Wood

• Animal dung

• Ethanol

• Municipal solid waste

What is the term used for carbon that was in the atmosphere until recently and is found in biomass?

• Fossil carbon

• Modern carbon

• Ancient carbon

• Synthetic carbon

Which renewable energy source is used alongside hydropower in the U.S.?

• Solar energy

• Wind energy

• Biomass combustion

• Geothermal energy

What is a fish ladder used for in hydroelectric power plants?

• To generate electricity

• To allow fish to travel upstream

• To store water

• To measure water flow

What is the main disadvantage of solar and wind energy mentioned in the text?

• They are expensive to install.

• They require fossil fuels to operate.

• They are not always available.

• They produce a lot of waste.