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Flip Charts
Changes in Ecosystems
Science, Grade 3
❮
1
/
2
❯
© Copyright NewPath Learning. All Rights Reserved. 94-4329
Visit
www.newpathlearning.com
for
Online
Learning
Resources.
Changes
in
Ecosystems
How
do
ecosystems
change?
Ecosystems
are
always
changing.
Some
changes
are
so
big
that
an
ecosystem
can
die,
or
change
into
another
kind
of
ecosystem.
For
example,
if
a
fire
burns
most
of
a
forest,
its
plant
life
will
have
to
start
over
again.
New
growth
will
start
with
grass,
weeds
and
small
shrubs.
Soon
young
trees,
or
saplings,
will
sprout,
but
it
will
be
many
years
before
there
will
be
tall,
strong
trees
standing
in
that
place
again.
Environmental
Changes
& Effects On Organisms
Another
change
that
may
happen
because
of
a
forest
fire
is
that
certain
populations
of
animals
will
leave
the
area
to
find
food
and
shelter
elsewhere.
Other
populations
that
depend
on
those
animals
for
food
will
also
leave
or
die
out.
For
example,
when
trees
burn,
squirrels
and
birds
leave,
and
foxes
and
coyotes
follow.
When
the
plants
start
growing
back,
animals
that
eat
them
will
start
to
return
to
the
forest.
Over
time,
if
left
alone,
the
forest
ecosystem
will
come
back.
Life
goes
on,
only
now
it’s
in
a
new
kind
of
environment!
© Copyright NewPath Learning. All Rights Reserved. 94-4329
Visit
www.newpathlearning.com
for
Online
Learning
Resources.
Pause
& Review
Ecosystems
can
change
for
many
reasons,
including
natural
disasters.
Changes
in
Ecosystems
Mount
St.
Helens
erupted
in
Oregon
in
1980.
Describe
how
you
think
this
affected
organisms
living
in
the
area.
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
Think
of
other
reasons
that
ecosystems
might
change.
Describe
some.
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
Mt.
St.
Helens
before
eruption
Mt.
St.
Helens
today
Photos
courtesy
of
USGS.
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