SCIENCE 6 3rd Quarter REVIEWER

Which of the following statements about friction is TRUE?

• Friction opposes the motion of objects.

• Friction occurs between non-rubbing surfaces.

• Friction causes moving objects to move faster.

• Friction acts in a direction similar to the direction of an object’s motion.

Will it be easier for a person to push a table on a carpeted floor than on a tiled floor?

• No, because the carpeted floor is rough, so friction is lesser.

• No, because the carpeted floor is rough, so friction is greater.

• Yes, because the carpeted floor is smooth, friction is lesser.

• Yes, because the carpeted floor is smooth, friction is greater.

When can we say that friction on a floor is greater?

• If the floor is wet.

• If the floor is tiled.

• If the floor is rough.

• If the floor is smooth.

A ball rolled after being kicked and slowed down until it stopped. Which of the following forces caused the ball to slow down?

• Electrical

• Friction

• Gravity

• Magnetic

Which is NOT a way of reducing friction?

• Applying lubricant

• Putting spikes on tires

• Making the floor smooth.

• Putting grease on bicycle gears.

Why do you need to put rollers under the cabinets when you want to move them?

• To apply more force.

• To stop the movement of the cabinet.

• To slow down the movement of the cabinet.

• To minimize friction through the small surface of contact of the rollers.

How do you describe the gravity that an object on Earth experiences if its mass is greater?

• Farther

• Greater

• Lesser

• Smaller

Which of the following possesses mechanical energy?

• A flat iron

• A dancing girl

• A glass of water

• A lighted bulb

Which forms of energy are/are produced by a candle?

I. Heat II. Electrical III. Light IV. Sound

• I and II

• I and III

• II and III

• III and IV

Which of the following are forms of energy?

I. Heat II. Light III. Shadow VI. Atom V. Electrical

• I and III

• I, II, and V

• II, III, and IV

• III, IV, and V