CBM 5 Review

Select all of the factors that affect the strength of an electromagnet.

• number of times the wire is looped around the core

• size of the object being attracted by the core

• amount of material in the core

• type of material in the core

• voltage of the battery

Tags

NGSS.MS-PS2-3

Which change would increase the magnetic force between these magnets?

• moving the magnets closer together

• placing a piece of glass between the magnets

• moving the magnets farther apart

• placing a sheet of steel between the magnets

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Three point charges are configured as shown below. Which statement explains the interactions of these charges?

• X exerts a force on Y to the left; Z exerts a force on Y to the right.

• X exerts a force on Y to the right; Z exerts a force on Y to the left.

• X exerts a force on Y to the left; Z exerts a force on Y to the left.

• X exerts a force on Y to the right; Z exerts a force on Y to the right.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

When astronauts walked on the Moon, they used weighted boots to help them walk due to the lower gravitational pull. What difference between Earth and the Moon accounts for the difference in gravity?

• density

• diameter

• mass

• volume

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

Which pair of objects has the greatest gravitational force between them?

• 1 kg, 1 kg, 5 cm

• 1 kg, 1 kg, 10 cm

• 2 kg, 2 kg, 5 cm

• 2 kg, 2 kg, 10 cm

Tags

NGSS.MS-PS2-4

The weight of an object can change even when the mass stays the same. Which statement correctly identifies a relationship between mass and weight?

• The weight of an object depends on its mass and its volume.

• Gravity affects the weight of an object but not its mass.

• The mass of an object depends on its weight and size.

• Magnetic fields can affect mass but not weight.

Tags

NGSS.MS-PS2-4

A student drops a bowling ball and an apple from a third-story window. Both objects hit the ground at the same time. From the experiment the student should conclude that

• the apple weighs more than the bowling ball.

• the bowling ball speeds up faster than the apple.

• more air friction is acting on the apple than on the bowling ball.

• gravity pulls on both objects, causing them to fall at the same rate.

Tags

NGSS.MS-PS2-4

One student rubs a balloon against his hair several times. Another student passes a comb through her hair several times. The students place the comb near the balloon and observe that the comb repels the balloon. Which is the most likely reason the comb is able to repel the balloon?

• The balloon has a positive charge and the comb is neutral.

• The balloon and the comb have the same electrical charge.

• The balloon has a negative charge and the comb is neutral.

• The balloon and the comb have opposite electrical charges.

Tags

NGSS.MS-PS2-3

A student wants to study the magnetic forces between three magnets. The student sets up an experiment by hanging three magnets next to each other. Which position will the magnets most likely take once the student places the magnets on the strings?

• A

• B

• C

• D

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

On a cold, dry winter day, Brandi moves across a carpet. When she touches the door knob, she receives a shock. Which particles transfer between Brandi’s body and the door knob causing the shock?

• atoms

• protons

• neutrons

• electrons

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5