Energy and Electrical Energy

Many devices we use every day transform electrical energy into other forms of energy.  Whenever energy changes form, some is given off as heat.  Which device below changes electrical energy into another form and gives off the most heat energy as well?

• radio
• kitchen blender
• remote control car
• light bulb

E'zarion has a small DC hobby motor, a battery, and a switch.  How many pieces of wire does he need to connect them into a circuit?

• 2
• 3
• 4
• 6

Saraleen is making an electrical circuit with a light bulb.  She needs a rod to complete the circuit.  Which of these could be used to complete the circuit and make the light bulb light up? 

• a copper rod
• a glass rod
• a rubber rod
• a wooden rod

Energy comes in many forms.  Which of the following represents mechanical energy?  

•  a computer
• a lit television screen
• a pot of water boiling
• a windup clock ticking 

Which form of energy do our bodies use from the food we eat?  

• chemical
• electrical
• light
• mechanical

Several forms of energy can move in waves.  Which of these does NOT? 

• chemical
• light
•  heat 
• sound

Which of the following has potential energy?  

• a ball that has been batted 
•   a rock sitting at the bottom of a hill
• a piece of pottery on the edge of a high shelf
• a hockey stick lying on the garage floor

Which of these best describes energy? 

• the movement of an object
• the attraction between magnets
• something that can be used as a fuel 
• the ability to cause motion or create change