Question
Which of the following is the most accurate definition for diffusion? movement of water from a low to a high concentration movement of water molecules from a high to a low a water concentration movement of molecules from a low to a high concentration movement of molecules from a high to a low concentration
Answer
3.9
(156 Votes)
Scarlett
Professional · Tutor for 6 years
Answer
Movement of molecules from a high to a low concentration.
Explanation
Diffusion is a passive process of transport. A single molecule moves from a region of high concentration (where there are many molecules) to a region of low concentration (where there are fewer molecules). Diffusion is always happening in liquids and gases (where the molecules are free to move around). The driving force behind the movement of molecules is the random motion of molecules, which is a result of the kinetic energy that molecules have. So, diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration.