Transferring Energy

Mrs. Westmoreland's students are complaining that it is hot in the classroom. She plugs in the fan and turns it on, which energy transformation occurs?

• mechanical to heat
• heat to mechanical
• electrical to mechanical
• mechanical to electrical

What is the best description of electrical energy?

• Transmitted energy
• A special form of heat or thermal energy
• potential energy in a different form 
• the energy flowing in an electric circuit

Which of the following is a way that energy transfer can be shown in a circuit?

• A fan begins to move. 
• A motor begins to move. 
• A light bulb lights up.   
• all of these 

What type of material allows electrons to easily flow through it?

• transistor
• conductor
• insulator
• inductor

A television converts electrical energy into _________________ and ______________ energies.

• light ; sound
• sound ; thermal
• light ; chemical
• mechanical ; light

A microphone converts ___________ energy into __________ energy.

• sound ; electrical
• electrical ; sound
• sound ; mechanical
• electrical ; thermal

What will convert electrical energy into thermal energy?

• heater
• fireplace
• car
• sun

Mr. Lu has constructed the electric circuit shown here. He tells his class that he knows electricity is flowing successfully through the circuit. What evidence shows Mr. Lu that the circuit is operating successfully?

• The battery and light bulbs are connected by string.
• Light energy has been created in the bulbs.
• The battery is yellow.
• Mechanical energy has been produced,

Energy is changed from one form to another during an energy transformation. 
Which of the following is an example of a transformation of electrical energy into another kind of energy?

• a light bulb lighting up 
• a motor making a noise 
• a heater feeling warm 
• all of these 

Mary's class is learning about the conservation of energy.
The teacher explains that energy cannot be created or destroyed, but it can change forms. 
The teacher says that a good example of this is a light bulb. Then, the teacher asks Mary to explain. What should Mary say is the reason that a light bulb is a good example of conservation of energy?

• The light bulb receives energy from wires, but it does nothing with the energy. 
• The light bulb receives electrical energy from wires and turns it into mechanical energy.
• The light bulb receives electrical energy from wires and turns it into heat and light energy. 
• The light bulb creates heat and light energy from nothing.