Alternative Fuels

Why is solar energy a good way to power machines?

• It does not get used up like oil does.

• Solar panels can be put up in many places.

• No pollution is released when using solar energy.

• All of the above

As compared to today, how will life be different in 2056 if something isn’t done to reduce the use of gasoline?

• There will be no cars.

• There will be fuel shortages.

• There will not be any pollution.

• The weather is likely to be colder.

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What is an alternative fuel?

• something unusual

• a different kind of fuel

• a fuel made from grass

• a way to get oil from rock

What is holding people back from using solar energy more?

• The heat from the Sun is too great.

• There’s no sunlight in many places.

• The cost of making the solar cells is too great.

• Solar cells are made from a very rare ingredient.

Where do scientists hope to get hydrogen to use in cars?

• from space

• from water

• from rocks

• from plants

Why can’t people just keep consuming gasoline at the

rate they are today?

• The world’s supply of gas is limited

• Gasoline engines will not be built after 2015.

• Gasoline will not be used as much in the future.

• Gasoline will not be able to be manufactured.

Fuel cells that would store hydrogen in cars are similar to

• a battery

• a gas tank

• a water tank

• a solar panel

What is the main advantage of ethanol over gasoline?

• It is cheaper to produce than gasoline.

• It comes from a renewable source.

• It changes plant matter into sugar

• All of the above

What is the result of the pollution that comes from burning gasoline?

• Earth is warming.

• Glaciers are melting.

• Weather patterns are changing.

• All of the above

What is an atom?

• a type of fuel

• a source of gasoline

• the animal that releases ethanol

• the smallest unit of a chemical element