8th Material SOL Review

Which of the following is an example of static electricity?

• A dry-cell battery that is connected to wires, lights up a light bulb.

• A balloon sticks to a wall after it is rubbed with a piece of wool.

• A magnet sticks to a refrigerator door made of metal.

• A light switch that is turned on runs a ceiling fan.

Tags

NGSS.MS-PS2-5

The illustration shows a wave. The wavelength is the distance between points −

• 1 and 2

• 1 and 4

• 2 and 3

• 2 and 4

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NGSS.MS-PS4-1

Which energy transformation occurs first in a coal-burning power plant?

• Chemical energy to thermal energy.

• Thermal energy to mechanical energy.

• Thermal energy to electrical energy.

• Mechanical energy to electrical energy.

Which of the following is an example of potential energy?

• A glass jar sitting on a shelf.

• A flag waiving in the wind.

• A ball rolling along a sidewalk.

• A battery powering a radio.

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NGSS.MS-PS3-2

A car manufacturer reduces the mass of a car by 250 kg. If the new design is otherwise identical to the old design, how will the new car compare to the old car?

• It will have a greater gravitational attraction to the road.

• It will require more fuel to operate.

• It will need less force to move.

• It will release more gas emissions.

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NGSS.HS-PS2-1

Which of these best describes the particle motion taking place as CO₂ gas is exposed to freezing temperatures?

• The particles decrease in speed.

• The particles move with more force.

• The motion of the particles becomes random.

• The motion of the particles is unchanged.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

P = W/t

To complete a project, 100 Joules of work are needed. The time taken to complete the project is 2 seconds. How much power is needed?

• 50 J/s

• 200 J/s

• 0.02 J/s

• 102 J/s

During a fireworks show, a family sees the spray of sparkles from a firework, and a moment later, they hear the pop. Which of these best explains why the pop and spray do not seem to occur at the same time?

• Light and sound travel through air.

• Sounds travels through a vacuum.

• Sound travels slower than light.

• Light and sound travel at the same speed.

On a sunny day, a person standing in front of a store window noticed an image of themselves in the glass. Why did they see their image in the glass?

• Some of the light was reflected off the surface of the glass.

• Some of the light passed through the glass window.

• Some of the light was absorbed by the glass surface.

• Some of the light separated into different colors.

Tags

NGSS.MS-PS4-2

A metal spoon was placed in a dish of ice cream and became cool. Which correctly describes the heat transfer process that resulted in the cooling of the spoon?

• Conduction, because the spoon was in contact with the cold ice cream.

• Convection, because the spoon was in contact with the cold ice cream.

• Conduction, because cold air currents affected the temperature of the spoon.

• Convection, because cold air currents affected the temperature of the spoon.

Tags

NGSS.MS-PS1-4