ESS Ch 20

A hydroelectric dam contains all of the following EXCEPT _______.

• magnets

• turbines

• combustion chamber

• generators

The electricity from nuclear power plants is produced by

• nuclear fission

• nuclear fusion

• natural gas combustion

• bioenergy

Hydropower uses the _______ energy of flowing water to generate electricity.

• kinetic

• potential

• nuclear

• chemical

Although hydroelectric dams generate electricity without producing greenhouse gases, they ______

• can disrupt ecosystems downstream and harm aquatic organisms, such as migrating fish

• still produce more greenhouse gases per unit of electricity produced than coal power plants

• cannot provide a consistent supply of electricity

• are short-lived structures that must be rebuilt about every 20 years

Which of the following is an alternative liquid fuel produced from biomass? (It's added to gasoline in the US)

• ethanol

• fructose

• petroleum

• methane

Which type of energy is most commonly used in the homes of those living in the poorest nations?

• biomass

• nuclear

• geothermal

• electricity

Which of the following elements is the starting material for nuclear fission reactions?

• uranium

• hydrogen

• carbon

• iron

An example of an energy source that is renewable and has less environmental impact than fossil fuels is _______.

• bioenergy

• coal

• crude oil

• nuclear

An earthquake and tsunami caused a meltdown at this nuclear power plant:

• Fukushima

• Chernobyl

• Three Mile Island

• Love Canal

Which of these describes a drawback to the use of nuclear power for electricity generation?

• Nuclear fission produces radioactive waste products that may take thousands of years to decay.

• Nuclear power produces more air pollution than coal-burning power plants.

• There is no way to adjust the rate of electricity production at a nuclear plant.

• Nuclear plants produce much less electricity than coal-fired power plants do.