OBSERVATION:
Water enters the
gummy bear
The movement of water
from the cup into the
Gummy Bear is called
Osmosis.
Osmosis is the passage of
water from a region of high
water concentration through
a semi-permeable
membrane to a region of
low water concentration.
Osmosis is the passage of
water from a region of high
water concentration
through a semi-permeable
membrane to a region of low
water concentration.
Osmosis is the passage of
water from a region of high
water concentration through
a semi-permeable membrane
to a region of low water
concentration.
 Cell membranes will allow small
molecules like Oxygen, water, Carbon
Dioxide, Ammonia, Glucose, aminoacids, etc. to pass through. Cell
membranes will not allow larger
molecules like Sucrose, Starch, protein,
etc. to pass through.
 Substances in the gummy bear that give
it solidity are: glucose, starch and
gelatin. All of these substances can
absorb (form some interaction with)
water. However, while water can be
absorbed, the starch and gelatin are
prevented from dissolving in water. So
the water swells the gummy bear rather
than dissolves it.
 Like a dry sponge such as used for
washing dishes. In this form it is a
small, hard material. However, it is
porous and water can go into those
pores. When water enters the pores,
the sponge gets enlarged, and
becomes flexible.
Osmosis is the passage of water
from a region of high water
concentration through a semipermeable membrane to a
region of low water
concentration.