Directions: On the line before each item, write ā€Iā€ if the substance is an electric insulator or ā€œCā€ if the substance is an electric conductor.

_____22. paper

_____23. glass

_____24. iron

_____25. plastic

_____26. gold

_____27. copper

_____28. wood

_____29. Rubber

_____30. Aluminum