10g 1st Final Review 1

Which of the following describes the energy changes in a cars engine?

• chemical -> electrical -> mechanical

• mechanical -> thermal -> mechanical

• chemical -> thermal -> mechanical

• thermal -> mechanical -> chemical

A killowatt-hour is a unit of _____________

• power

• electrical energy

• current

• resistance

Where is the magnetic force exerted by a magnet the strongest?

• center

• north pole

• south pole

• both poles

A generator turns ________ into ____________

• thermal energy, electricity

• electricity, thermal energy

• mechanical energy, electricity

• electricity, mechanical energy

To produce electric current, nuclear power plants produce which of the following?

• steam

• carbon dioxide

• plutonium

• water

Which of the following is the source of almost all of Earth's energy resources?

• plants

• magma

• the Sun

• fossil fuels

Which is a conductor?

• glass

• copper

• wood

• plastic

Which of the following will NOT increase the strength of an electromagnet?

• more coils

• an iron core

• bigger wires

• wind energy

Which of the following materials is a good thermal insulator?

• copper

• iron

• plastic

• aluminium

If you burn your hand on a hot pan, then how was that heat transferred to your skin?

• conduction

• convection

• radiation

• insulation