Heat and Electricity

Each picture shows a source of heat. Which heat source transfers heat energy through radiation?

• the sun
• boiling water
• ice cube melting
• stirring hot liquid

Tags

NGSS.4-PS3-2

• The light came on, and the buzzer made a sound at the same time. 
• The light and buzzer stayed off because the light and buzzer have to be in different circuits. 
• The light and buzzer stayed off because there was no source of electric current in the circuit.
• The light and buzzer stayed off because the circuit needs two switches for two different elements. 

Many homes use electric ovens to cook food. What energy transformation occurs in an electric oven?

• thermal energy into light energy 
• thermal energy into electrical energy
• electrical energy into thermal energy
• electrical energy into energy of motion

• heat energy to sound energy
• electrical energy to sound energy
• energy of motion to sound energy
• electrical energy to energy of motion 

A circuit made of wires, a lamp, a switch, and a cell is shown at the right. What change is needed for the lamp to glow? 

• The switch needs to be opened.
• The switch needs to be closed.
• The cell needs an insulator.
• The wire needs to be connected to the bottom of the cell.

Tags

NGSS.4-PS3-2

Which material is the best conductor of heat? 

• aluminum 
• glass
• wood
• plastic

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NGSS.MS-PS3-3

NGSS.MS-PS3-4

Which of the following items could not be used to create a closed circuit? 

• battery, light bulb 
• battery, wires, buzzer
• battery, light bulb, wires 
• battery, light bulb, buzzer, wire

Which statement best describes the circuit in the diagram?

• If one light goes out the other light will also go out because it is a series circuit.
• There is only 1 path.
• If one light goes out the other light will stay on because it is a parallel circuit.
• The circuit is opened.

Which is NOT an insulator.

• Wool
• Plastic
• Copper
• Glass

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NGSS.5-PS1-3

Which is an example of conduction?

• A pot on a stove

• The sun

• Rubbing hands together

• A radiator warming up to heat the air.