Unit 5 Review Science

This circuit is .....?

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

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

• 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 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 

Look at the picture.  What causes the light bulb not to 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 

Pick the correct sentence.

• This circuit will work because it is a closed circuit.
• Energy will freely flow in this circuit.
• This circuit will not work because there is no energy source.
• This circuit will not work because there is no switch.

What is a Parallel circuit? 

• Has only one path 
• Has more than one path 
• Allows energy to travel through easily 

Which one is a conductor? 

• wood 
• iron 
• plastic spoon 
• paper