14 April 2010

On that day,my class learnt about diffusion and osmosis.so here is my 3.2.1 reflection on it :)

3 Things I Learnt
I learnt that diffusion takes place in all three states of matter while osmosis only occurs in liquids and when an partially permeable membrane is present.I also learnt that diffusion is a part of osmosis,since both processes have a higher concentration of a substance moving to a lower concentration.Another thing I learnt is that osmosis occurs in plants such as when water is absorbed by the root cells.

2 Questions
One question is that why do substances diffuse?Another question is that is water able to go into our body through osmosis of the skin cells?

1 Useful Application
One useful application is air sprays.The spray will diffuse from the can into the surrounding air as the concentration of the spray is lower in the surroundings.This is why we can smell it even if we're away from the can.