Unit 2 Lesson 5

The girl shown below is using an electrical appliance that has a motor.  Which energy transformation is she using?

• electrical energy into heat energy and energy of motion
• sound energy into electrical energy and energy of motion
• electrical energy into sound energy and chemical energy 
• energy of motion into electrical energy and sound energy 

A student began building a circuit to light a bulb.  What else does the student need to produce light?

• a battery that has energy
• a wire that is insulated
• a switch that is open
• another bulb of the same size

When electricity flows in a circuit, it can produce all of the following forms of energy EXCEPT,

• solar
• light
• thermal
• sound

The picture below shows a device made of a battery, a nail, and a long piece of copper wire. It converts electrical energy into a different form of energy.  Which term describes the device in the illustration?

• electric switch 
• electromagnet
• electric motor
• electric generator

Avrie starts to make an electric circuit using a battery, a light bulb, a paper clip, and some wire. She arranges the circuit’s parts as shown below.  Where would be the best place for Avrie to put a piece of wire in order to complete the circuit?

• between the top of the battery and the top of the paper clip
• between the top of the battery and the bottom of the light bulb
• between the top of the paper clip and the bottom of the battery
• between the top of the paper clip and the bottom of the light bulb 

What is the purpose of the wire in a circuit?

• to use the electric current
• to provide a source of electrical energy
• to connect the components
• to change the circuit from open to closed 

What is the purpose of the the battery in a circuit?

• to use the electric current
• to provide a source of electrical energy 
• to connect the components
• to change the circuit from open to closed 

Brayden uses a thermometer to take a single reading of the water in a beaker. What is Brayden measuring?

• conduction rate
• temperature of the water 
• amount of energy transferred from the beaker to the water 
• amount of energy transferred from the water to the beaker 

Camden knows that radiation is one form of heat transfer. Which example shows a transfer of heat through radiation?

• hand holds a cold glass of milk 
• flame warms air in a hot-air balloon 
• puddle of water warms under the sun
• pot of boiling water sits on a gas burner 

Each picture shows a source of heat. Which picture shows heat transfer through conduction?

• sun shining on swimming pool
• sun shining on the greenhouse
• heater giving off heat
• ice cube melting in hand