BM3 REVIEW

What was Benjamin Franklin best known for besides his scientific work?

• Discovering gravity

• Inventing the light bulb

• Writing novels

• His contribution to American independence

What did Franklin use to prove that lightning is electricity?

• A metal rod

• A silk handkerchief

• A battery

• A kite

What did Franklin attach to the kite to conduct electricity?

• A silk ribbon

• A copper wire

• A plastic rod

• A key

What was the purpose of the silk ribbon in Franklin's experiment?

• To fly the kite higher

• To insulate his hand from electricity

• To attract more lightning

• To measure the height of the kite

What did Franklin prove with his kite experiment?

• That kites can fly in storms

• That silk ribbons are good insulators

• That electricity can be stored in a Leyden jar

• That lightning is a form of electricity

What invention resulted from Franklin's observations on electricity?

• The electric bulb

• The battery

• The electric motor

• The lightning rod

What phenomenon did Franklin's lightning rod aim to explain?

• Moon phases

• Solar flares

• Saint Elmo's fire

• The aurora borealis

Why hasn't the lightning rod provided perfect protection?

• Because lightning is unpredictable

• Because it can't conduct all types of electricity

• Because lightning surges back and forth

• Because the rods are not tall enough

What did Franklin nearly lose his life to?

• An electrical machine malfunction

• A Leyden jar discharge

• A lightning strike

• A kite accident

What was the first practical invention relating to electricity?

• The lightning rod

• The electrical machine

• The Leyden jar

• The electric generator