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Which of the following materials would be a poor conductor of electricity?

• Aluminum

• Copper

• Rubber

• Steel

Shari is using two toy cars to experiment with force and motion. The cars have different masses. Car A has a mass of 100 grams. Car B has a mass of 300 grams. Shari pushes each car forward using the same amount of force. Which car will travel farther?

• Car A will travel farther.

• Car B will travel farther.

• The cars will travel at the same distance.

• It is not possible to predict which car will travel farther.

Tags

NGSS.MS-PS2-2

As part of a science project, Samuel slides several different objects down a ramp. The objects Samuel uses are a magnet, a marble, a wooden block, and a metal car. Which two forces are acting on all the objects as they slide down the ramp?

• Gravity moves the objects, and friction slows them down.

• Friction moves the objects, and gravity slows them down.

• Magnetism moves the objects, and gravity slows them down.

• Gravity moves the objects, and a pulling force slows them down.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Ms. Adler writes the following description on the board.

1. a pendulum swinging from side to side

2. a motionless tire swing

3. two people exactly balanced on a seesaw

During which of these situations are unbalanced forces at work?

• only

• only

• and

• and

Tags

NGSS.MS-PS2-2

Bar magnets have a north pole (N) and a south pole (S). Latisha places a bar magnet on three small straws so that it can roll. Her setup is shown below. Placing which of the following objects at point X will cause the bar magnet to move away from point X?

• An iron nail

• an aluminum can

• the north end of another bar magnet

• the south end of another bar magnet

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-5

Stephanie started pushing a bookcase across the room, as shown in picture 1. Then, she removed the books and continues pushing with the same force and direction in picture 2. How does removing the books affect the motion of the bookcase?

• The mass is decreased, making the bookcase move faster.

• The gravity is increased, making the bookcase move slower.

• The friction is increased, making the bookcase move slower.

• The mechanical energy is decreased, making the bookcase move faster.

Tags

NGSS.MS-PS2-2

Two teams of students are pulling on a long rope with a flag in the middle. The teams pull in opposite directions to try to move the flag across a line on the ground, but the flag does not move. Which statement explains why the flag in the middle of the rope does not move?

• The team pulls with equal force on both ends of the rope.

• The force of friction is less than the force of the teams pulling on the rope.

• The force of gravity is greater than the force of the teams pulling on the rope.

• The team on one end of the rope pulls with greater force than the team on the other end of the rope.

Tags

NGSS.MS-PS2-2

A student is completing an experiement with boxes of different masses. She applies a force of 5 newtons to each box and measures the effect on each box by recording the distance it moves. Which box will be the least affected by the applied force?

• box 1

• box 2

• box 3

• box 4

Tags

NGSS.MS-PS2-2

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-PS3-4

Sam was riding his bike up a hill. His pedaling caused the bike to move. What type of force did Sam apply to the pedals to make his bike move?

• friction

• gravity

• pull

• push

Tags

NGSS.3-PS2-1