Review for 3rd Periodic

Car A runs 12 kilometers in 2 minutes. What is its speed?

• a. 4 kilometers per minute

• b. 5 kilometers per minute

• c. 6 kilometers per minute

• d. 10 kilometers per minute

Car B runs 15 kilometers in 3 minutes. What is its speed? ___________

• a. 4 Kilometers per minute

• b. 5 Kilometers per minute

• c. 6 Kilometers per minute

• d. 10 Kilometers per minute

Which of the following refers to a change in position of an object relative to another object as

    reference point?

• energy

• force

• motion

• speed

The velocity of a plane is 500 miles per hour West. What is the speed of the plane?

• a. 500 miles

• b. 500 miles per hour

• c. 500 miles per hour West

• d. 500 miles per hour West

The distance from Mr. Castro’s residence and office is 30 kilometers. Using his motorcycle, he can

    reach his office in 10 minutes. What is the change in position or distance travelled by the motorcycle

    per minute?

• a. 3 Kilometers

• b. 10 Kilometers

• c. 4 Kilometers

• d. 30kilometers

Which of the following explains why cooking utensils are made of metals but the handles are made of plastics?

• A. Metal is hard while plastic is soft.                 

• B. Metal is heavy, but plastic is light.

• C. Metal is durable while plastic is less durable.

• D. Metal is a good conductor of heat while plastic is a poor conductor of heat.

Which material below is NOT a good conductor of heat and electricity?

• a. aluminum

• b. iron

• c. copper

• d. styrofoam

Which of the following groups of objects are good conductors of electricity?

• A. Iron lock, pencil, masking tape

• B. Copper wire, iron nail, steel ruler

• C. Silver spoon, paper towels, woolen scarf

• D. Aluminum cup, steel ruler, plastic bottle

Which of the following statements is TRUE about conductors?

• A. These materials are not made of metals.

• B. Conductors prevents the flow of electricity.

•   C. They conduct electricity from the source to the load.

• D. Copper wires are covered with plastic materials called conductors.

Which of the following materials can reflect light?

• a. mirror

• b. black cloth

• c. clear glass

• d. green leaf