Unit 16 2022

Any object that contains _____ will attract a magnet.

• metal

• rocks

• iron

• water

Dominic and Jamal were exploring properties of magnets. The images below show the setup for their investigation. Choose the 3 statements that are true.

• The magnets in setup A will repel each other.

• The magnets in setup A will attract each other.

• The magnets in setup B would repel each other.

• The magnets in setup B will attract each other.

• The magnets in setup A and setup B all contain iron.

Which of the following describes the movement of the domino?

• The domino will not move because the forces are balanced.

• The domino will move to the left because the forces are unbalanced.

• The domino will move to the right because the forces are unbalanced.

• The dominoes will move to the left because the forces are balanced.

What force pushes the parachute upwards?

• air resistance

• gravity

• friction

What force pulls the parachute downwards?

• air resistance

• gravity

• friction

Which statement accurately describes the forces acting on the parachute below?

• The force of gravity pulls the paratrooper towards the Earth, but the air resistance pushes on the paratrooper with a greater force.

• The force of gravity pushes on the parachute with a larger force that the air resistance is pulling on it.

• The force of gravity pulls on the paratrooper with a force larger than the air resistance pushing up on the paratrooper.

• The gravity and air resistance pull on the paratrooper with equal force.

Describe how the machine is supposed to work. Make sure you include the forces and what will cause the machine to start and stop.

• Gravity will make the domino fall over, pushing the ball down the ramp. The ball pushes the toy car into the trash can, but the trash can will pull the car stop.

• A force must be used to start the chain reaction. The force will cause the dominoes to push the ball down the ramp, into the toy car. The trash can will then pull the toy car towards it.

• A force must start the chain reaction machine, which will cause the dominoes to run into the ball. Magnetism will pull the ball down the ramp into the toy car. The toy car will roll into the trash can.

• A force must start the chain reaction machine which will push the dominoes into the ball. The ball will roll down the ramp because of gravity. The ball will push the toy car at the bottom of the ramp into the trash can.

When the student tries to make the chain reaction machine work, the car does not roll far enough to hit the garbage can. What is one design change that the student should try and how will the design change solve the problem.

The student can move the garbage can _____.

• closer

• farther

When the student tries to make the chain reaction machine work, the car does not roll far enough to hit the garbage can. What is one design change that the student should try and how will the design change solve the problem.

The student can make the ramp _____.

• higher

• lower

When the student tries to make the chain reaction machine work, the car does not roll far enough to hit the garbage can. What is one design change that the student should try and how will the design change solve the problem.

The student can put something _____ over the carpet.

• rough

• smooth