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When a plant is photosynthesising it uses up lots of CO2
...So there's little Co2 left....
Therefore diffusion happens!!!
Particles (CO2) move from an area of high concentration to an area of low
concentration
At the same time...O2 is made as a waste product of photosynthesis....some
is used in respiration and the rest diffuses out through the stomata
Particles move from an area of high concentration to an area of low
concentration…read more

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No photosynthesis
(no sun = no light)
· Lots of CO2 is made in respiration & not
much ovygen left....
so CO2 continues to diffuse out and O2
diffuses in.…read more

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Water also escapes the leaf by diffusion
because there is a lot inside (high
concentration) and less of it outside in the
air (lower concentration)
This diffusion of water vapour of leaves is
known as Transpiration…read more

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