Question

an object is in motion if it ____________ in respect to a reference point. * 1 point
○ changes position
○ gets bigger
○ gets smaller
○ rests

Explanation:

In physics (a subfield of Natural Science), the definition of motion is that an object is in motion when its position changes relative to a reference point. "Gets bigger" or "gets smaller" refer to changes in size, not motion. "Rests" means no motion. So the correct option is the one about changing position.

Answer:

A. changes position