Define diffusion and osmosis giving examples.
Answers
Diffusion- The process by which moleculea of a substance move from higher concentration to lower by direct contact
e.g- sugar in water
Osmosis-The flow of water molecules from the area of higher concentration (solvent) to the area of lower concentration(solute) through a semipermiable membrane
e.g-absorption of water molecules by roots
Answer:
Osmosis and Diffusion Definitions
Osmosis:
Osmosis is the movement of solvent particles across a semipermeable membrane from a dilute solution into a concentrated solution. The solvent moves to dilute the concentrated solution and equalize the concentration on both sides of the membrane.
Diffusion:
Diffusion is the movement of particles from an area of higher concentration to lower concentration. The overall effect is to equalize concentration throughout the medium.
Osmosis and Diffusion Examples
Examples of Osmosis:
Examples of osmosis include red blood cells swelling up when exposed to fresh water and plant root hairs taking up water. To see an easy demonstration of osmosis, soak gummy candies in water. The gel of the candies acts as a semipermeable membrane.
Examples of Diffusion:
Examples of diffusion include perfume filling a whole room and the movement of small molecules across a cell membrane. One of the simplest demonstrations of diffusion is adding a drop of food coloring to water. Although other transport processes do occur, diffusion is the key player.