WHAT I KNOW
Direction: Choose the letter of the correct answer.
1. What do you call the materials through which electricity passes easily?
A. conductors B. insulators C. non-conductor
metallic
2. Which of the following group of materials are conductors of electricity?
A. Copper, silver, gold, glass and zinc
B. Gold, paper, leather cloth and plastic
C. Iron, copper, silver, gold and nickel
D. Wood, paper, leather cloth and plastic
3. Which of the following group of materials are insulators?
A, silver, gold, nickel, iron
B. glass, zinc, copper, gold
C. leather, book, paper, wood
D. nylon cord, cotton cord, wire.
4. What do we call the materials that do not transmit electricity and heat?
A. conductors B. insulators C. iron D. wire
5. Why do conductors conduct electrical current very easily?
A. It is because of heat.
B. It is because of protons.
C. It is because of free electrons.
D. It is because of heat and protons.
6. Why does a metal spoon gets warm when used to stir hot soup?
A. It conducts heat,
B. It is an insulator
C. The water is hot.
D. It is a conductor and insulator.
7. Which of the following materials is the best conductor of heat and electricity?
A. aluminum
B. silver
D. copper
C. gold
8. Which of the following explains why some handles of pots are made of wood?
A. Wood is hard.
B. Wood is a good insulator.
C. Wood is a conductor of heat.
D. Wood is durable and conductor of heat.​