Review

This graph shows the motion of an object. Which best describes the motion of the object?

• It is sitting still.

• It is moving at a constant speed.

• It continually increases its speed.

• It travels at constant speed and suddenly stops.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

Which graph depicts an object whose speed is increasing?

• 
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• 
• 

Tags

NGSS.MS-PS3-1

Which information is needed to determine the speed of an object?

• the weight of the object and the the pull of gravity on the object and the amount of time it travelsdistance it travels

• the pull of gravity on the object and the amount of time it travels

• the inertia of the object and the amount of force that is pushing it

• the distance the object travels and the time it takes to travel that distance

Which tools will be most helpful to a scientist measuring motion?

• a measuring tape, a stopwatch, and a thermometer

• a compass, a stopwatch, and a measuring tape

• a stopwatch, a scale, and a thermometer

• a scale, a compass, and a stopwatch

Tags

NGSS.MS-PS3-1

A student puts four objects in a bucket filled with water. Which two objects are most likely less dense than the water? (5.5A)

• Wood block and metal paper clip

• Plastic ball and glass marble

• Metal paper clip and glass marble

• Wood block and plastic ball

Tags

NGSS.MS-PS1-2

A mother is on the train. To the boy, she looks like she is moving. To the mother, she isn’t. Why are the perspectives different?

• Distance

• Frame of reference

• Reference point

• Speed

What best describes motion?

• Change of speed over time

• Change in position over time

• Change of acceleration over time

• Change in velocity over time

Why do scientists use a reference point?

• To determine if an object is in motion

• To find information in the library

• To know where they are

• To measure speed

Which best explains why the cyclists cannot be used as a good reference point?

• It is heading in the wrong direction

• It is moving too slow

• It is moving too fast

• A good reference point should not move

When one force in a pair is greater than the other, we call this:

• Balanced force

• Unbalanced force

• Magnitude

• Friction

Tags

NGSS.3-PS2-1