The document discusses different types of materials in electric circuits. It states that materials fall into three categories: insulators, conductors, and resistors. Insulators do not allow electric current to flow, examples include plastic and rubber. Conductors allow current to flow easily, examples include metals like copper and aluminum. Resistors allow some current to flow but convert some to other forms of energy like light, motion, heat, or sound. Circuits must have a continuous conductive path for current to flow from the power source. Switches are used to open and close circuits to control current flow.

1. Conductors and insulators

2. When it comes to the flow of electric current, all materials fall into three categories:

3. When it comes to the flow of electric current, all materials fall into three categories: insulators

4. When it comes to the flow of electric current, all materials fall into three categories: insulators conductors

5. When it comes to the flow of electric current, all materials fall into three categories: insulators conductors resistors

6. Insulator – Any material that does not allow electric current to pass through it plastic rubber glass like the protective coating on wires

7. Insulator – Any material that does not allow electric current to pass through it plastic cloth wood like the protective coating on wires

8. Insulator – Any material that does not allow electric current to pass through it plastic rubber glass cloth wood like the protective coating on wires

9. Insulator – Any material that does not allow electric current to pass through it plastic rubber glass cloth wood like the protective coating on wires

10. Insulator – Any material that does not allow electric current to pass through it plastic rubber glass cloth wood like the protective coating on wires

11. Insulator – Any material that does not allow electric current to pass through it plastic rubber glass cloth wood like the protective coating on wires

12. Insulators like plastic and rubber are used as a covering for electric wires. This makes electric wires safer to handle because the insulator protects you from the current.

13. Conductor – insulator conductor Any material that allows electric current to pass through it

14. Conductor – copper insulator conductor Any material that allows electric current to pass through it

15. Conductor – copper aluminum insulator conductor Any material that allows electric current to pass through it

16. Conductor – copper aluminum steel insulator conductor Any material that allows electric current to pass through it

17. Conductor – copper aluminum steel any metal insulator conductor Any material that allows electric current to pass through it

18. Conductive material (metal) is used for wires that will carry electricity. insulator conductor

19. A material or a device that allows some current to pass but converts some of the current to another form of energy. Resistor Light energy Motion energy Heat energy Sound energy

20. into light energy Motion energy eat energy Sound energy These appliances have resistors that convert electrical energy into light energy.

21. Light energy Motion energy Heat energy Sound energy These appliances have resistors that turn electrical energy into motion energy.

22. Light energy Motion energy Heat energy Sound energy These appliances have resistors that change electrical energy into heat energy.

23. These appliances have resistors that convert electrical energy into sound energy.

24. Useful electric current can only move through a path of conductive material.

25. Useful electric current can only move through a path of conductive material. This path is called a …..

26. Circuit A path for electric current

27. An electric circuit might be open or closed. A path for electric current

28. Closed Circuit An unbroken path for electric current (no gaps, current can flow). The light is on

29. Open Circuit A path for electric current that has a gap (no current can flow). gap The light is off

30. Most electrical devices have a switch in the circuit to make it easy to close (turn on) and open (turn off) the circuit.

31. Switch A tool to open and close a circuit switch

32. A circuit can also be opened and closed by touching two wires together. Open circuit Closed circuit No current can flow current can flow

33. A circuit can also be closed by touching those two wires to a conductor. ed circuit current can flow