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Diffusion and
Osmosis
DIFFUSION
• The process in
which molecules
move from areas
of HIGH
concentration to
areas of LOW
concentration
OSMOSIS
• The diffusion of
water molecules
through a
membrane
When do the molecules stop
moving?
EQUILIBRIUM = molecules are evenly
distributed
Let’s Practice…
Let’s Practice…
• The concentration of oxygen particles
inside a cell is 45 percent and outside the
cell is 30 percent. What will most likely
happen?
Let’s Practice…
• The concentration of water molecules
inside a cell is 80 percent and outside the
cell is 25 percent. What will most likely
happen?
Let’s Practice…
• The concentration of hydrogen particles
inside a cell is 33 percent and outside the
cell is 62 percent. What will most likely
happen?