Transcript Journey of a Waterdrop

JOURNEY OF A WATER DROP
THROUGH A PLANT
By: Habiba S
WHY DO PLANTS NEED WATER?
 Photosynthesis is the process
plants use to create food, they
require water to do so.
 Plants also need carbon
dioxide to make food,
transpiration is the exchange
of water for carbon dioxide,
this happens when the water
evaporates through tiny
openings in the leaves called
stomata.
WHY DO PLANTS NEED WATER?
 Turgidity uses water
to put pressure on the
cells in the plant to
prevent it form
wilting.
 Water acts as a
solvent to help
transport nutrients in
a liquid form around
the plant to keep it
alive.
STAGE 1: THE ROOTS
 The journey of the water drop
begins at the roots of the plants.
The absorption of water is taken
care of by the younger parts of
the roots called root hairs.
 Root hairs increase the area
where absorption can take place,
this is done by the process of
osmosis.
 Osmosis is the movement of
water from an area with a high
concentration of water, to a a
place with less concentration.
STAGE 2: XYLEM &
PHLOEM
 After entering the root hairs, the
water needs to be transferred
upwards to the stems and leaves
through a vascular tissue called
xylem.
 This happens because water
molecules are stuck the xylem by
adhesion.
 Water molecules carry a slight
electric charge, which cause them
to attract to each other. This
attraction is known as cohesion,
linking water molecules in long
chains.
STAGE 2: XYLEM & PHLOEM
 Phloem is another
tissue in the plant,
though it is responsible
for moving around food
manufactured in the
leaves by
photosynthesis around
the plant.
 Water diffuses from the
xylem into the phloem.
STAGE 3: PHOTOSYNTHESIS &
STOMATA
 When the water reaches the leaves, it
escapes the xylem through tiny holes
on the surface of the leaves called
stomata.
 When a molecule evaporates is pulls
another to replace it, this helps the
chain of water molecules continue
while keeping the pressure low to
allow water and nutrients to come in
from the roots through the process of
osmosis.
STAGE 3: PHOTOSYNTHESIS &
STOMATA
 Water could also go the
photosynthesis process
to create food for the
plant, which usually takes
place in the leaves of the
plant.
 Photosynthesis is the
process of converting light
energy to chemical
energy, this process takes
place in the chloroplast
specifically using
chlorophyll.
STAGE 3: PHOTOSYNTHESIS &
STOMATA
 Inside the leaf there is a layer
of cells called the mesophyll.
The mesophyll can be divided
into 2 layers, the palisade cells
and the spongy cells.
 Palisade cells are where
photosynthesis occurs, when
converting light energy to
chemical energy
 Spongy cells are more loosely
packed, and that allows space
for gas exchange.
Bibliography
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Bibliography - Images
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Works Cited
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