A cat strolls across your backyard.An hour later,a dog with its nose to the ground follows the trail of the cat.Explain what is going on from a molecular point of view.
A)The dog is following the areas of increased density of the Earth.
B)The dog is smelling atoms from the cat.
C)The dog is smelling molecules from the cat.
D)The cat is leading the dog into a trap.

Question

Quizplus · Accepted Answer

When the cat strolls across the backyard, it leaves behind a trail of molecules from its scent glands. The dog, with its highly sensitive nose, can detect these molecules and follow the trail to find the cat. The dog is not detecting individual atoms, but rather complex molecules that create the scent trail.

A Cat Strolls Across Your Backyard