Energy Sources

Which of these is not currently a source of usable energy?

• The Sun

• The Moon

• Heat from within the earth's crust

• Running water

What can you infer about fossil fuels from their name?

• They emit harmful gases when burned.

• They've been buried in the earth's crust for millions of years.

• They're the most abundant energy source on the planet.

• They're used to make gasoline.

Where would you be likely to find a generator?

• At a power plant that supplies electricity to an entire town.

• Inside a coal-burning stove.

• In the furnace that heats your school.

• In your car's gas tank.

How do generators use magnets to create electricity?

• A magnet can induce an electric current in a coil of wire

• A magnet can separate electrically-charges particles from non-charged particles

• A magnet can attract electric energy from the air and transfer it to a wire

• A magnet can draw electrical energy from within the earth's crust

In the word "hydroelectricity," which of the following does the prefix "hydro-" relate to? Choose the best answer.

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Which of the following is a true statement about fossil fuels?

• Burning them creates air pollution

• There is an infinite supply of them within the earth's crust

• They are very difficult to refine into usable fuel

• They are not carbon-based

What happens in nuclear fission?

• Energy is released when two atoms collide with one another

• Energy is released when two atoms travel at the speed of light

• Energy is released when an atom is split apart

• Energy is released when two atoms are combined

In what order were the following energy sources discovered by humans?

• Biomass energy was discovered first; then fossil fuels, then fuel cells

• Fossil fuels were discovered first, then fuel cells, then biomass energy

• Fuel cells were discovered first; then fossil fuels, then biomass energy

• Biomass energy was discovered first, then fuel cells, then fossil fuels

Which of these is an example of biomass energy?

• A coal-burning generator

• A wood-burning stove

• A gasoline-burning automobile

• An automobile that operates on fuel cells

Why are fuel cells considered a "clean" energy source?

• The electricity they produce cannot harm humans

• They produce a kind of soap when burned

• They do not have to be manufactured in factories

• They do not emit environmentally harmful byproducts