TNReady Review: Quarter 1

At first, the two skaters in the picture are motionless. Then they push their hands against each other with equal amounts of force.

Which of these is the MOST LIKELY result of the skaters' action?

• One skater moves forward while the other skater remains in place.

• One skater moves backward while the other skater remains in place.

• Both skaters move away from each other.

• Both skaters move toward each other.

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NGSS.MS-PS2-1

Which statement best explains why the magnet in the tube in Figure 1 is not moving?

• a force only acts on the magnet when a second magnet is in the tube

• a force that is equal to the weight of the magnet is pushing up on the bottom of the magnet

• the only force is the weight of the magnet pushing up on the bottom of the tube

• the force of the tube pushing on the magnet is greater than the force of the magnet pushing on the tube

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

Based on Figure 2, which two types of forces on the magnets act at a distance?

• electrical

• friction

• gravitational

• magnetic

• elastic

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which statement BEST describes the forces in Figure 2?

• the forces oppose the direction of an object's motion and increase as the speed of the object increases

• the forces work in the same direction as an object's motion and decrease as the speed of the object decreases

• the forces are applied to other objects through a force field and increase as the distance between objects decreases

• the forces cause air particles to apply a force on other objects and increase as the distance between objects decreases

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS2-5

Which statement BEST explains why the dropped magnet hovers above the magnet at the bottom of the tube?

• the gravitational force and the magnetic force on the dropped magnet are balanced

• the gravitational force and the magnetic force on the dropped magnet are unbalanced

• gravitational fields in the tube apply equal but opposite gravitational forces to each magnet

• the magnetic field in the tube is weaker at the bottom of the tube than at the top of the tube

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NGSS.MS-PS2-4

NGSS.MS-PS2-5

Which 2 statements below describe the forces acting upon the magnets in Figure 2 when magnet 2 is hovering above magnet 1?

• There is a downwards gravitational force acting on both magnet 1 and magnet 2

• There is an upwards gravitational force on both magnet 1 and magnet 2

• There is a downwards gravitational force acting on magnet 2 and an upward gravitational force acting on magnet 1

• There is a downwards magnetic force acting on magnet 2 and an upwards magnetic force acting on magnet 1

• There is an upwards magnetic force acting on magnet 2 and a downwards magnetic force acting on magnet 1

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-4

Which TWO reasons explain why Group 4 was able to lift more paper clips than Group 5?

• Group 4's electromagnet had a stronger magnetic field than Group 5

• Group 4 had the battery facing in the opposite direction of Group 5

• Group 4 had more current flowing through the wire than Group 5

• Group 4 had more wire coiled around the iron nail than Group 5

• Group 4 used a more powerful battery in their design than Group 5

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NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

An electric motor uses regular magnets and an electromagnet to create motion. The attracting and repelling forces create rotational motion along with the electric current from the electromagnet.

What can a car manufacturer do to make an electric motor stronger?

• A car manufacturer can add coils to the electromagnet and increase the size of the magnets causing the rotational motion

• A car manufacturer can add coils to the electromagnet and decrease the size of the magnets causing the rotational motion

• A car manufacturer can remove coils from the electromagnet and increase the size of the magnets causing the rotational motion

• A car manufacturer can remove coils from the electromagnet and decrease the size of the magnets causing the rotational motion

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NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

NGSS.MS-PS2-3

An electromagnet is shown.

What is the role of the battery in the electromagnet?

• provides power to the electromagnet

• becomes the magnet in the electromagnet

• creates the magnetic field in the electromagnet

• carries the electrical current through the electromagnet

Students want to create an electromagnet by wrapping four coils around a steel nail. The wire is connected to two batteries. What can the student do to increase the strength of the electromagnet's magnetic field?

• use fewer batteries

• use an aluminum nail

• increase the number of coils in the wire

• decrease the number of coils in the wire

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5