Sc 3 P 11 2

Students are experimenting with a toy car on a smooth, wooden ramp that has a height of 1 meter. They apply a force of 2 newtons to the car to push it down the ramp. The students measure how fast it rolls down the ramp. They want to try to get the car to go even faster down the ramp. What could the students do in order to increase the speed of the car?

• Increase the force applied to the car.

• Decrease the height of the ramp

• Decrease the angle of the ramp.

• Increase the friction of the car.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-5

A team of movers needs to move a heavy sofa. One mover puts slippery pads under each leg of the sofa. This allows the sofa to slide easily across the floor. How does the use of the pads change the forces involved in moving the sofa?

• The friction force on the sofa decreases.

• The magnetic force on the sofa increases.

• The force of gravity on the sofa decreases.

• The pushing force by the movers increases.

Tags

NGSS.MS-PS2-2

During a storm, the power goes out at Randall's house. His mother strikes a match to light a candle. As the match burns, it gives off light energy. What other form of energy does the burning match give off?

• chemical

• electrical

• mechanical

• thermal

Latisha notices that when she rubs her hands together, they feel warm. Which of the following is the best explanation for why this happens?

• Energy is reflected into her hands.

• Heat energy is produced by friction.

• Light energy of the sun heats her hands.

• Energy is absorbed from the air by her hands.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Light travels in waves. Which of the following statements about light waves is NOT true.

• They travel in straight lines.

• They can come from natural or artificial sources.

• They can change directions when they are reflected or refracted.

• They can travel through any substance.

Tags

NGSS.MS-PS4-2

Damian was studying mechanical energy in science class. He noticed several possible examples of mechanical energy in his environment. Which of the following is an example of mechanical energy?

• A lamp that is not plugged in.

• An unused battery.

• A windmill with no wind.

• A garden hose with moving water.

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

The smooth, shiny surface of the water shows a hot air balloon. What causes the image of the hot air balloon to appear on the surface of the water?

• The refraction of light.

• The reflection of light.

• The absorption of light.

• The splitting of light.

What energy change occurs when an electric stove is turned on?

• Mechanical energy is converted into electrical energy

• Electrical energy is converted into chemical energy

• Mechanical energy is converted into heat energy

• Electrical energy is converted into heat energy

Tags

NGSS.MS-PS1-4

Jason stretches a rubber band between his fingers as shown. When he plucks the rubber band, it makes a sound. Which of the following BEST explains why the rubber band makes a sound when Jason plucks it?

• It heats the air.

• It vibrates the air.

• It absorbs energy from the air.

• It releases molecules into the air.

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Joe touched the metal spoon that was sitting in a hot pot on the stove. He felt like he burned his hand. Why did this happen?

• The spoon was hot because heat transferred from the soup to the spoon.

• The spoon was hot because heat transferred from the soup to the pan.

• The spoon was hot because the temperature of the soup did not change.

• The spoon did not get hot, he burned his hand on the stove.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4