Electricity and Energy

Tasha tested several items to see if they could conduct electricity.  Her data is shown below. What is the best claim she could make from her data?

• Wood is an insulator.
• Metal is an insulator.
• Keys are insulators.
• Toothpicks are conductors.

Which bulbs will light?

• 1 and 2
• 2 and 3
• 3 and 4
• 4 and 2

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 

Which object shows an energy transformation from electrical to mechanical?

• 
• 
• 
• 

Which items would have this energy transformation: electrical energy -> thermal energy and light energy?

• toaster
• candle burning
• windmill turning
• Iron for your clothes

All sounds are made by ____ objects.

• warm
• cold
• reflecting
• vibrating

Sound is a kind of energy that travels in ___.

• waves
• currents
• wires
• groups

This sound wave has a:

• high pitch
• low pitch

This sound wave has a: 

• high pitch
• low pitch

Which material is the best conductor of heat?

• glass
• styrofoam
• metal
• wood