Electrical Energy
Electrical energy is the flow of what?
A. Water
B. Air
C. Electricity
C. Electricity
A closed circuit lets electricity:
A. Stop
B. Flow
C. Float
B. Flow
Which is a conductor?
A. Metal
B. Rubber
C. Paper
A. Metal
When a toaster gets hot, it changes electrical energy into:
A. Heat
B. Sound
C. Movement
A. Heat
Electricity in circuits travels in a:
A. Circle
B. Straight line only
C. Random path
A. Circle
Which device uses electrical energy?
A. Window Blinds
B. A flashlight
C. A water faucet
B. A flashlight
What will happen if part of the circuit is open?
A. The light turns off
B. The light turns on
C. The light explodes
A. The light turns on
Which is an insulator?
A. Aluminum foil
B. Plastic
C. Copper
B. Plastic
A lamp turns electrical energy into:
A. Heat
B. Light
C. Both heat and light
C. Both heat and light
When a TV is plugged in, it uses:
A. Heat energy
B. Electrical energy
C. Wind energy
B. Electrical energy
Where does most electricity in homes come from?
A. Power plants
B. The Sun
C. Volcanoes
A. Power Plants
What powers the circuit?
A. Battery
B. Wires
C. Switch
A. Battery
Why are wires covered in plastic?
A. To protect us
B. To make it spark
C. To make it look cool
A. To protect us
If you add more batteries to a closed circuit, what usually happens?
A. The device gets more energy
B. The wires lose electricity
C. The batteries stop working
A. The device gets more energy
You flip a switch and the light comes on. Why?
A. The circuit closes
B. The light gets scared
C. The wires fall apart
A. The circuit closes
A switch is added to a circuit. What is its main purpose?
A. To heat the wires
B. To open and close the circuit
C. To make the battery stronger
B. To open and close the circuit
Which is NOT needed to create a circuit?
A. Wires
B. Battery
C. Switch
C. Switch
Which item would stop electricity?
A. Metal spoon
B. Rubber band
C. Nail
B. Rubber band
Which device changes electrical energy into heat?
A. Refrigerator
B. Hair dryer
C. Water Fountain
B. Hair dryer
A student builds a circuit where the light bulb barely glows. What is the MOST likely cause?
A. The bulb is too new
B. There isn’t enough electrical energy
C. The circuit is too short
B. There isn’t enough electrical energy
What do we call the path electricity travels on?
A. Route
B. Circuit
C. Tunnel
B. Circuit
A wire in the circuit acts like:
A. A road for electricity
B. A power source
C. An on/off button
A. A road for electricity
Why are metals used in circuits instead of materials like wood or plastic?
A. Metal is a better insulator
B. Metal is a better conductor
C. Metal is cheaper
B. Metal is a better conductor
What type of energy makes the metal coils in a toaster glow?
A. Light energy
B. Food energy
C. Heat energy
A. Light energy
What energy change happens in Christmas lights?
A. Electrical → heat & light
B. Electrical → sound
C. Electrical → heat
A. Electrical → heat & light