Current electricity Flocabulary eighth grade

What is electricity?

• the energy produced when an object vibrates

• the energy stored in the bonds of chemical compounds

• the energy produced by electrons

• the energy of motion

Which of the following always has a negative charge?

• a proton

• an electron

• a battery

• all of the above

The flow of electrical energy is called a(n)

• insulator.

• current.

• circuit.

• electron.

For electricity to flow, what do you need?

• only a battery

• only a battery and a light bulb

• only a battery, light bulb and wire

• a battery, light bulb and wire in a closed circuit

Electricity cannot flow through porcelain. Porcelain is therefore a(n)

• conductor.

• insulator.

• electron.

• conductor and insulator.

Electricity can flow through graphite. Graphite is therefore a(n)

• conductor.

• insulator.

• electron.

• conductor and insulator.

How does a switch control the flow of electricity?

• A switch can open or close a circuit.

• A switch can convert electricity into heat.

• A switch can make electrons positively charged.

• A switch can make electrons neutral.

Jacob tested a material in the science lab. He put it between a wire and a battery in a closed circuit. What evidence might have led him to decide the material is a conductor?

• The battery lost its energy.

• He created a short circuit.

• The wire did not get hot.

• The light bulb turned on.

Jacob tested a material in the science lab. He put it between a wire and a battery in a closed circuit. What evidence might have led him to decide the material is an insulator?

• The battery did not die.

• She did not create a short circuit.

• The wire got hot.

• The light bulb was off.