Unit 5 Review: Thermal/Electrical Energy and Circuits

Unit 5 Review: Thermal/Electrical Energy & Circuits

TEKS:

4.8B identify conductors and insulators of thermal and electrical energy;

4.8C demonstrate and describe how electrical energy travels in a closed path that can produce light and thermal energy.

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Multiple Choice

Avery and Jose design a prototype to solve a problem of lighting up a darkspace. They have asked questions, imagined and planned the solution below.

What is the next step in the Engineering Design Process and will the circuit in their plan produce light and thermal energy?

• The next step is create. The circuit will produce light and thermal energy.

• The next step is create. The circuit will not produce light and thermal energy

  because there is no power source.

• The next step is improve. The circuit will not produce light and thermal energy

  because there is no power source.

• The next step is improve. The circuit will produce light and thermal energy.

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Multiple Choice

___________________ are materials that ALLOW heat and electricity to move easily through them.

• Conductors

• Insulators

Multiple Choice

What is an example of a conductor?

• wood 
• metal
• rubber
• rock

Multiple Choice

Insulators are materials that-

• A material that does allow thermal energy to flow through easily.

• A material that is magnetic and does not allow thermal or electricity to pass through easily

• A material that is not magnetic and stops thermal energy from passing through easily

• Material that is magnetic and does not allow thermal energy to flow through easily

Multiple Choice

Jennifer is cooking using a metal pot which has plastic coverings on the handles. Why is she able to pick up the pot after it has been heated?

• The plastic handles act as an insulator.

• The metal pot acts as an insulator.

• Both the pot and the handles are conductors.

• Both the pot and the handles are insulators

Multiple Choice

What is the difference between a conductor and an insulator?

• An insulator allows electricity to flow through easily and a conductor does not.

• An insulator is magnetic and a conductor is not

• A conductor allows electricity to flow through easily and an insulator does not.

• A conductor is magnetic and an insulator is not.

Multiple Choice

The electrical wires in many homes are made of copper and covered with plastic. Why are copper and plastic good choices for electrical wires?

• Copper is a conductor of electricity, and plastic is an insulator of electricity.

• Copper is an insulator of electricity, and plastic is a conductor of electricity.

• Copper is a conductor of electricity, and plastic is an insulator of heat.

• Copper is an insulator of electricity, and plastic is a conductor of heat.

Multiple Choice

What would happen if the switch was opened?

• nothing, the light bulbs would still work because there is a complete path
• The light bulbs would not work because the path was broken
• the battery would loose energy
• the wires would be cooled from air

Multiple Choice

Frank placed a metal spoon in a glass bowl of hot soup. He then went back to get crackers. When he touched the spoon he was surprised to find that it was hot. Frank knew that the spoon was not hot when he put it in the soup. Which sentence best explains how this happened?

• The radiation from the microwave bounced onto the spoon.

• Spoons begin heating up when they are placed into liquids.

• Thermal energy is transferred from the soup to the spoon.

• Heat is created when metals and glasses combine with one another.

Multiple Choice

Olivia wanted to complete her circuit with a conductor.  What object is her best option?

• Wood stick
• Glass bead
• Aluminum foil
• Styrofoam

Multiple Choice

Which statement is true?

• The light bulb will light up because the  circuit is complete.
• The light bulb will light up because the  circuit is broken.
• The light bulb will not light up because the  circuit is complete.
• The light bulb will not light up because the  circuit is broken.

Multiple Choice

Would would best complete this circuit?

• A wire
• A switch
• A battery
• A light bulb

Multiple Choice

Choose the correct sentence.

• This circuit will work because it is an open circuit.
• This circuit will work because it is a closed circuit.
• This circuit will NOT work because it is an open circuit.
• This circuit will NOT work because it is a closed circuit.

Multiple Choice

An incomplete circuit is shown.
To complete the circuit, a wire should be placed from —

• Point D to Point C
• Point B to Point C
• Point A to Point D
• Point B to Point D

Multiple Choice

Elijah places four different materials at the same temperature onto a hot plate to find out which material is the best insulator. The information presented in the table shows the temperature of each material after 15 minutes.

Elijah can conclude that which of the following materials is the best insulator?

• Material 1

• Material 2

• Material 3

• Material 4