Physical Science Final Exam Review

Henry investigates how the flow of electricity produces magnetism. He follows this procedure. Since only two paper clips adhered to the nail, which action would BEST make the electromagnet attract more paper clips?

• Replace the nail with a pencil.

• Reverse the direction of the positive and negative poles of the battery.

• Connect an on/off switch between the battery and the nail.

• Increase the number of coils of insulated wire.

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NGSS.MS-PS2-3

Jonathan models two kinds of circuits containing identical bulbs and batteries. If one of the bulbs in each circuit breaks, which of the following explains what would happen to the rest of the bulbs?

• Electrons would stop flowing in all bulbs of circuits A and B.

• The flow of electrons would stop in all bulbs of circuit B but not of circuit A.

• Electrons would stop flowing only in the broken bulbs of circuits A and B.

• The flow of electrons would stop in all bulbs of circuit A but not of circuit B.

If a circuit has a current of 0.25 A and a voltage of 3 V, how much resistance is in the circuit?

• 12 ohms

• 1.5 ohms

• 0.75 ohms

• 0.083 ohms

The ambulance is moving towards the woman standing on the sidewalk. As the ambulance approaches the woman, how will she perceive the pitch of the siren and why?

• She will perceive a higher pitch because the speed of the sound waves is faster.

• The pitch she will perceive will be the same, only the intensity of the sound is greater.

• She will perceive a higher pitch because the frequency of the sound waves is higher.

• The pitch she will perceive will be the same, only the volume of the sound is louder.

The table shows the speed of sound in different media. A sound wave travels through the air, then into a glass block. Assuming frequency remains the same, how is the wavelength affected?

• It increases.

• It decreases.

• It remains the same.

• It increases then decreases

Tags

NGSS.MS-PS4-2

A beam of light is reflected off a mirror. Which of the following diagrams best illustrates how light rays are reflected off a mirror?

• 
• 
• 
• 

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NGSS.MS-PS4-2

What is one difference between an electromagnetic wave and a mechanical wave?

• An electromagnetic wave can travel through a vacuum. A mechanical wave must have a medium to travel through.

• A mechanical wave can travel through a vacuum. An electromagnetic wave must have a medium to travel through.

• An electromagnetic wave moves parallel to the direction of the wave's travel. A mechanical wave can move only perpendicular to the direction of the wave's travel.

• An electromagnetic wave moves perpendicular to the direction of the wave's travel. A mechanical wave can move only parallel to the direction of the wave's travel.

Kartianna is pushing a lawn mower using a force of 300 N. If she pushes the mower a distance of 800 m, how much work has she done?

• 1,100 J

• 24,000 J

• 110,000 J

• 240,000 J

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NGSS.MS-PS3-5

A boy uses a simple pulley to pull a block up a ramp. The height of the ramp is 4 m and the length of the ramp is 10 m. Assuming that the ramp is frictionless, what is the ideal mechanical advantage of the ramp and does the pulley provide any additional advantage?

• The mechanical advantage of the ramp is 10, and the pulley does not provide any additional mechanical advantage.

• The mechanical advantage of the ramp is 40, and the pulley does provide an additional mechanical advantage.

• The mechanical advantage of the ramp is 2.5, and the pulley does not provide any additional mechanical advantage.

• The ideal mechanical advantage of the ramp is 0.4, and the pulley makes it easier to pull the block up the ramp.

Three spheres are dropped from a height of 10.0 meters in a vacuum. The data from the results is shown below. Which of the following relationships is true?

• For each additional kilogram of mass, the force of the sphere doubles.

• The force of the spheres decrease as the mass of the spheres increase.

• The acceleration of the spheres is constant, even when the mass and force change.

• The mass and force of the spheres will remain constant if their acceleration is constant.

Tags

NGSS.MS-PS2-1

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