Circuits

Which of these best completes the circuit?

• rubber band
• metal nail
• leather shoelace
• wooden toothpick

Which of these substances conducts electricity the best?

• wood
• brick
• copper
• plastic

Will the light bulb in this circuit light and why/why not?

• yes, because it has two batteries
• no, because the switch is open
• yes, because it is in a circuit
• no, because the bulb is burned out

A student builds a circuit made up of a battery, two light bulbs, and a switch. What will the student most likely observe in this circuit?

• Light bulb 1 and light bulb 2 will both be on

• Light bulb 1 will be off, but light bulb 2 will be on

• Light bulb 1 and light bulb 2 will both be off

• Light bulb 1 will be on, but light bulb 2 will be off

Tags

NGSS.4-PS3-2

NGSS.3-5-ETS1-1

The diagram shows a series circuit with three lit bulbs. How many of the bulbs will remain lit if the wire is cut a the point shown by the arrow?

• 0

• 1

• 2

• 3

A group of students built the circuit shown above. The lightbulb does not glow. Which statement explains this observation?

• The battery is not charged

• The lightbulb is not part of a complete circuit

• The circuit does not have a switch

• The bell uses most of the energy from the battery

Why won’t the light bulbs in the circuit pictured light up?

• The wires from the second light bulb are not connected to the battery
• The wires are not connected between the light bulbs 
• The wires are not connected to both sides of the first light bulb
• The wires are too long to complete the circuit 

Tags

NGSS.4-PS3-2

What is a switch's function in a circuit?

• to make the current hotter or colder
• turn on and off the flow of current
• the pathway that current flows
• to add more power to the circuit

When all parts of the circuit are connected it is a ______ circuit. 

• open
• closed

When you flip a light switch on and off you are closing and opening a circuit.

• true
• false