Position and Motion

To describe an object's _____, you must first choose a(n) _____ as a starting point.

• motion, direction
• distance, reference point
• position, reference point
• distance, position

From there, you must specify the _____ to the object and the _____ in which it lies from the starting place.

• motion, time
• distance, direction
• time, direction
• motion, direction

If you are giving directions to two objects located in different directions from the same _____, it can sometimes be helpful to describe one object being in the _____ direction from that place and the other in the _____ direction.

• distance, north, south
• time, north, south
• reference point, positive, negative
• distance, positive, negative

An object is in _____ any time its _____ is changing.

• motion, position
• distance, motion
• speed, position
• time, speed

In most cases, such a change involves changes in _____ and _____ from the starting point.

• time, speed
• distance, time
• speed, displacement
• distance, displacement

However, if an object returns to its starting point, its _____ is zero, even though it might have traveled a considerable _____ .

• time, position
• position, time
• displacement, distance
• distance, displacement