Adriana

Biology

13 July, 01:45

Air is a mixture of gases in which molecules of different gases move about

freely. Peeling an onion releases molecules you can smell into the air. The

process of diffusion causes the onion molecules to naturally:

O

A. fall to the floor.

O

B. spread out in the air.

O

C. react with gases in the air.

O

D. concentrate near the ceiling.