11. Conductors are materials that do not allow heat and electricity to pass through them. 12. Materials that do not conduct electricity are called insulators. 13. Copper is widely used for electrical materials because they are ductile and a good conductor of electricity. 14. Hand glove protects us from burning or electrocution because they are good conductor of heat and electricity. 15. Cooking pots and pans made of metals make cooking faster because they quickly allow heat to transfer since these materials are good conductors of heat.​