B. Exercises Exercise 1 Directions :: Identify the materials which are good conductors of heat and electricity. Draw a if the material is a conductor of heat and electricity and moon on a separate piece of paper. -sun (if it is an insulator. Write your answers- 1. plastic glass 6. nickel 2. rubber 7. copper wire 3. aluminum 8. wool 4. iron 9. silver 5. wooden ladle 10. ceramic