7.P.1.1 Reference Points

Which best explains why the cyclist (#3) 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.

• A

• B

• C

• D

• A

• B

• C

• D

Explain how the motion of an object can be described by its position, direction of motion, and speed with respect to some other object.

What best describes motion?

• change of speed over time

• change in position over time

• change of acceleration over time

• change in velocity over time

Tags

NGSS.MS-PS3-1

Students are observing a frog. The frog will not hop or move forward. Two students start a debate. Marcus states that the frog is moving because it can hop. Maria states the frog is not moving because it is not changing position. Who is correct and why?

• Marcus- everyone knows a frog can hop.

• Marcus- everyone knows hopping is movement.

• Maria- an object has to change position to “move”.

• Neither- position has nothing to do with movement AND the frog is able to hop.

Tags

NGSS.3-PS2-2

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 of the following objects would make a good reference point?

• A flying bird

• A bus that is driving down the street

• A car at a stoplight

• A tree

Megan is sitting in her parked car. If she turns and looks at the car pulling forward, what direction would it appear HER (Megan’s) car was moving?

• 
• 
• 
• 

Which best explains why the cyclist (#3) 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.

the process of changing position

• motion
• reference point
• acceleration
• speed

Tags

NGSS.MS-PS2-2