Transcript Living together - Fridays with Ms Gwen

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Activity 1:
There is a variety of living
and non-living
components in any
particular environment.
Questions to think about…
What is a
population?
What is an
organism?
What is a community and
what are some
examples?
Do different habitats
support different
communities?
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Organism
Living Thing
•
•
•
•
Microorganisms
Fungus
Plants
Animals
bacterium
elephant
mushroom
mangrove tree
Question:
Do organisms
live alone, by
themselves?
Question:
They
usually live
with other
organisms
of their own
kind.
Population
• A population is a group of organisms of
the same kind that live together and
reproduce in a particular place.
The
The population
population of
of mimosa
ants in
plants
a field includes
a placeinincludes
the total
the
total number
number
of youngofand
mimosa
plants
– both
the
adult ants
living
there.
seedlings and adult
plants growing there.
Question:
Is this
considered
only one
population?
Population size
The number of organisms in a population is
called the population size.
Population size is always changing.
Increases
Decreases
Environmental factors:
Natural
• Availability of water,
food, air, space,
shelter for protection
• Natural disasters
like earthquakes,
hurricanes
Man-made
• Deforestation
(cutting/burning
trees)
• Spraying
insecticides to
control population of
harmful insects
Habitats
• The place where an organism lives is
called its habitat.
• We can often find populations of several
kinds of organisms in a habitat.
What are some
examples of habitats?
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Examples of habitats
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Examples of habitats
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Examples of habitats
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Examples of habitats
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Examples of habitats
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Habitats
The place where an
organism lives is called its
habitat.
Provides everything the
organisms need to
survive.
Question:
Your pet goldfish lives in
an aquarium in the living
room.
Is the living room its
habitat?
Question:
No. When we refer to
‘habitat’, we are talking
about its natural
environment. A pond is the
habitat for a goldfish.
Interdependence
• All the populations living in a habitat depend on
one another for survival.
• We say they are interdependent.
• For example:
Animal
wastedepend
also
Other
Someplants
plants
depend
enriches
the
on
tosoil,
help
on animals
insects
such
as
making
it their
fertile
for to
disperse
butterflies
andseeds.
bees
plants
to grow
well.
pollinate
the flowers.
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Interdependence
• Animals depend on plants too.
• For example:
Plants
are insects
also
a
Birdeaters,
and
Animals
also
get
Plant
in the
turn,
source
of
food
for for
depend
on
trees
oxygen
they
need
provide
food
for
plant
eaters.
shelter
and
when
plants
animal
eaters.
protection.
photosynthesise.
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Community
• All the different populations of organisms
living together in the same habitat form a
community.
Community
Different populations of
organisms living together.
Organism
A living thing
Population
A group of organisms
of the same kind living
together.
Habitats
The place or the natural environment
where an organism lives and
reproduces is called its habitat.
Provides everything the
organisms need to
survive.
oxygen
A pond is an aquatic habitat.
Water plants
are
a
source
of
carbon
food fordioxide
some aquatic animals.
They also Aquatic
provide animals
shade and
and
shelterplants
for thedepend
animals
and
on each other
their eggs.
for oxygen and carbon dioxide.
A pond community
• There are also some micro-organisms
living in the pond.
• These are only visible under a microscope.
• They are food for many of the aquatic
animals.
• Examples:
water flea
with eggs
paramecium
euglena
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A pond community
• A pond community includes organisms
that live in as well as near a pond.
• Some examples of these organisms:
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More examples of organisms from a
pond community
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Some
animals
living
There
are
many
kinds
earthworm
mimosa
termite
bee
Let us take
a
look
at
some
snail
among thewoodlouse
plants in the
spider
vernonia
common
organisms
that
of
plants
and
animals
field while other animals
can
be
found
in the soil.
in
a
field
community.
butterfly
can be grasshopper
found
in the soil.
love
grass
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lizard
moth
spider
On the
trunk is another
The
garden
Many animals
canto
bestudy
found here.
excellent
place
Some animals have colours that
the
common animals and
blend with the bark of the tree so
plants
living
there.
it is difficult
to spot
them.
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praying
dragonfly
caterpillar
ladybird
bird
stink
bug
mantis
On stems and leaves
The stems and leaves provide food for
many animals. Plants provide plant sap
for insects. Caterpillars of moths and
butterflies bite and chew up leaves.
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bee
butterfly
spider
ixora
lily
bougainvillea
On flowers
Butterflies, moths and bees
are often seen on flowers
collecting nectar and pollen.
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Among roots and under stones
The larvae of many beetles can be
found among the roots of plants. Ants
move everywhere on the ground,
under the stones and on plants.
toad
snail
ant
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A single plant community
• A single plant like a banana or
sweet potato plant can be a
habitat for many populations of
plants and animals.
• There may be fewer
populations found on a single
plant, but the plants and
animals are interdependent on
one another.
• Some of these organisms may
spend their entire lives on the
same plant.
banana plant
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Communities in other habitats
• There are many other
habitats where organisms
live. Some of these
habitats include forests,
mountains, seashores
and rotting logs.
What organisms
can you find in
these
communities?
AA
rotting
log
seashore
community
community
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