Simple Circuits

This circuit is .....?

• open
• parallel
• closed
• shows the flow of electricity

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

A circuit is the path that electricity follows.

• true

• false

A circuit must be closed for electrons to travel.

• true
• false

What is a switch's function in a circuit?

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

Which of these best completes the circuit?

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

Which light will be brighter and why?

• Bulb A because its circuit is closed
• Bulb B because its circuit is closed
• Bulb B because it has more volts
• Bulb A because it has less volts

Which of the following can supply energy in an electric circuit?  

•  a conductor
• light bulb
• a wire
• a battery 

Look at the picture.  Why won't the light bulb light up?

• The wires from the light bulb are not connected to the battery
• The switch is not closed to form a complete circuit 
• The wires from the light bulb are not connected to the switch 
• The wires from the battery are not connected to the switch