Question

1. which graph correctly shows the effect of heat energy on the motion of molecules of matter? * 1 point

Explanation:

Step1: Recall the relationship

Heat energy increases temperature, and as temperature rises, the rate of molecular motion (kinetic energy) increases. So we need a graph where temperature and molecular motion rate have a positive correlation (as one increases, the other does too).

Step2: Analyze each graph

• Top - left: Negative correlation (motion rate decreases with temp increase) – incorrect.
• Top - right: V - shaped, not a consistent positive/negative – incorrect.
• Bottom - left: No change in motion rate with temp – incorrect.
• Bottom - right: Positive correlation (as temperature increases from 55 to 85, motion rate increases) – matches the relationship.

Answer:

The graph at the bottom - right (the one with the positive - sloped line, under option 2)