5p1.1

the amount of material in a substance

• inertia

• force

• mass

• motion

as mass increases, the acceleration has to decrease: the law of acceleration

• Newton's First Law of Motion

• Newton's Second Law of Motion

• Newton's Third Law of Motion

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NGSS.MS-PS2-2

Which best explains why a bicycle slows down when its brakes are applied?

• The brakes heat the rubber on the bicycle tires.

• The brakes add energy to the bicycle.

• The brakes increase the force of gravity on the bicycle

• The brakes cause frictional forces on the wheels of the bicycle

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NGSS.MS-PS3-5

What causes a wagon to speed up when going down a hill?

• gravity

• friction

• air pressure

• mass

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NGSS.MS-PS3-5

Scientists discover an asteroid that is moving through space. What information is needed to determine the average speed of the asteroid?

• the mass and size of the asteroid

• the distance the asteroid is from Earth

• the direction the asteroid is moving and its distance from Earth

• how far the asteroid has moved in 24 hours

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If a car is moving backward along a road, can its speed be measured?

• Yes, it can, because the car does not have friction acting on it.

• Yes, it can, because the car travels a distance in a certain amount of time.

• No, it cannot, because speed can only be measured if the car is moving

  forward.

• No, it cannot, because the distance traveled backward by a car cannot be

  measured.

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NGSS.MS-PS3-1

A ball is kicked and rolls along a level field until it comes to a stop. What is most responsible for the ball coming to a stop?

• air

• gravity

• mass

• friction

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NGSS.MS-PS3-5

A runner measured the time it took him to run 5 km. What can he calculate from

the distance and time measurements?

• direction

• mass

• speed

• force

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NGSS.MS-PS3-1

A wagon is pushed in a straight line. How would an increase in friction on the wagon wheels affect the wagon?

• It would cause the wagon to move faster.

• It would cause the wagon to change mass.

• It would cause the wagon to change direction.

• It would cause the wagon to slow down.

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NGSS.MS-PS2-2

Which is the best explanation for how air masses move across the United States?

• The prevailing westerlies move air masses from west to east across the United States but may be deflected by the jet stream.

• The trade winds move air masses from west to east across the United States.

• The jet stream moves air masses from the Pacific Ocean across the United States.

• The warm air of the Gulf Stream causes air masses to move from the Atlantic Ocean to the Pacific Ocean.

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