ENERGY

A student placed a pencil in a cup of water.  The pencil appears broken because light-

• always travels in a straight line
• bends when it passes through water
• makes the water in the glass evaporate
• reflects the pencil on the water's surface

Which form of energy is being used by the toaster?

• Light
• Electrical
• Thermal
• Sound

The reflector on a car is a use of

• mechanical energy
• light energy
• thermal energy

Students are tying to determine if the mass of and object can effect the distance it will travel. What materials would they need to conduct this experiment?

• stopwatch

• balance

• meter stick

• hot plate

Which of these could be placed in the gap to complete the circuit?

• rubber band

• iron nail

• wooden toothpick

• paperclip

If you were building a circuit, why would you use metal and not rubber to send electricity through the circuit? 

• metal is a better insulator
• rubber is a better conductor
• metal is an insulator, but rubber is a conductor
• metal is a conductor, but rubber is an insulator

The illustration shows a lamp plugged into an outlet.
When the lamp is turned on and the bulb is lit, the circuit demonstrates which of the following?

• Sound energy changing to light energy
• Electrical energy changing to light energy
• Electrical energy producing mechanical energy
• Light energy producing sound and heat energy

This picture is an example of - 

• refraction
• reflection
• absorbing
• reduction

Underwater geysers have temperatures that are over 100 degrees Celsius when they erupt. What type of energy causes this?

• light

• sound

• electrical

• thermal

Which of these substances conducts electricity the best?

• Wood
• Brick
• Copper 
• Plastic