Download Olga`s Water Lesson-2009

Thirst for Life
Science, grade 4
Olga Volnycheva
Guess: Why Are We Here?

We will help you
understand how
plants depend on
water
Why Do Plants Need Water?
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
Plants like all
living creatures
need water to
survive
Water is a
basic for all
plant life
Types of Plants Depending on Water
Land Plants
•
•
Water Plants
Underwater Plants
All plants need water
Some plants need more water than others
Desert Plant Survival
Thirst for Life
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Cacti usually have
special means of
storing and
conserving water.
They often have few
or no leaves, which
reduces
transpiration.
Some plants have
adapted to arid
environments by
growing extremely
long roots, allowing
them to acquire
moisture at or near
the water table.
Water and Underwater Plants Survival
Water and underwater
plants have
adapted to living in
or on aquatic
environments.
They have smaller
roots that water
can go directly into
leaves.
Surface plants like
water lily have flat
leaves for floatation