Question

Molecular motion is a measure of the movement of the molecules in a substance. Molecular motion is substantially different between the different states of matter. For example, the molecules in _______ move more than the molecules in _______.
A.
air, wood
B.
wood, soda
C.
wood, air
D.
soda, air

Answer 1

The best option that illustrates the differences in molecular motion between solids and gases is:

**A. air, wood**

In this option, the molecules in air (a gas) move more freely and energetically compared to the molecules in wood (a solid), which are more fixed and vibrate in place.