Circuits and Batteries

1. What is the main purpose of a battery in a circuit?

• A. To store extra light
• B. To act like a pump for electrons
• C. To create new electrons
• D. To block the flow of electricity

2. What must happen for a light bulb to turn on?

• A. The wire must be broken
• B. The battery must run out of chemicals
• C. There must be a complete, unbroken loop
• D. You only need one wire connected

3. What are electrons?

• A. Tiny particles that move through a circuit
• B. The chemicals inside the battery
• C. The light produced by the bulb
• D. The wires used to connect the circuit

4. What happens when you add an open switch to a circuit?

• A. The light gets brighter
• B. The battery creates more electricity
• C. The circuit becomes a complete loop
• D. The path is broken and the light goes out

1. Why does a battery eventually stop working?

• A. It runs out of electrons
• B. The chemicals that push the electrons get used up
• C. The electrons get tired and stop moving
• D. The light bulb uses up all the electricity

2. What happens to the electricity as it passes through a light bulb?

• A. The electricity is all used up by the bulb
• B. The bulb uses the energy, but the electrons keep flowing
• C. The electrons stay inside the bulb forever
• D. The electricity turns into more electrons

3. If you have a battery, a bulb, and only one wire, why won't the bulb light up?

• A. You need a second wire to complete the loop
• B. The wire is not long enough
• C. The battery is too strong for one wire
• D. The bulb needs a special kind of battery

4. Where do electrons crowd together before they move through the circuit?

• A. At the positive end of the battery
• B. Inside the light bulb
• C. At the negative end of the battery
• D. In the middle of the wire