The document defines ecosystems as consisting of all the living and nonliving things in an environment that interact with each other. It explains that living things need habitats to meet their basic needs like food, water, and shelter. An ecosystem contains various populations of organisms that make up communities living in the same place. Food chains show the transfer of energy as plants are eaten by primary consumers, and then by secondary consumers. A food web depicts the interconnected food chains in an ecosystem.

1. WHAT ARE ECOSYSTEMS?

2. Where Do Living Things Live???
Living things need a place to
live and grow.

3. Fish live in water.

4. Birds live in trees and fly through
the air.

5. Plants grow where there is soil,
water and sun.

6. Habitat is a place where plants
and animals lives.

7. Different types of organisms live
in an ecosystem.
A group of
organisms of
the same kind
living in the
same place is
a population.

8. Main Idea and Details
Living things need
a place to live
and grow.
Fish live in water.
Birds live in trees
and fly in the air.
Plants grow where
there is soil, water
and sun.

9. ENVIRONMENT
The living and
nonliving things
that surround a
living thing make
up its environment.

10. What do living things get from their
environments?
Many living things share their
environments and its resources.
1. Food
2. Water
3. Oxygen
4. Space

11. Parts of an Ecosystem
 An ECOSYSTEM is made up of all the living and
nonliving things in an environment.
 Ecosystem is a system of living things that
interact with each other and with the physical
world.

12. All the population that live in an
ecosystem at the same time form a
community.

13. All members of a community
live in the same ecosystem but
they do not all live in the same
part of the ecosystem.

14. It is a place where they can meet
their needs.
Animals get food, water, and shelter
from their habitat,

15. Organisms and their Habitats
 Some organisms can survive only in
certain habitats.
 For example, a polar could not find the
water it needs in a desert.

16. COMPONENT OF ECOSYSTEM
 BIOTIC (Living things)  ABIOTIC (Non Living Things)
Air
Rocks
Cave
Soil
water
Fish
Water lily
Plants
Animals
People

17. Use the following tree map to write
a lesson summary.
Parts
of an
Ecosystem
Populations Communities Habitats

18. Interdependence among biotic
component
Food chain

19. All energy comes from the sun
Plants harness the sun’s
energy in which process?

20. Plants need light for photosynthesis,
what else do they need?
We call plants producers because they produce
energy from the sun directly.

21. Many animals eat only plants-they are
vegetarians. We call animals that eat plants
primary consumers

22. The next group, called the secondary consumers
are carnivores or omnivores. They eat the primary
consumers.

23. A Basic Food Chain
Plants absorb light from the
sun, which is turned into
energy to grow. We call
these producers.
The vegetarian animals eat
the plants, they are called
primary consumers.
Secondary consumers
prey on primary
consumers.

24. What is a food chain?
A food chain is “a sequence of organisms, each of
which uses the next, lower member of the
sequence as a food source1”

25. Sort these animals into a food chain..
Can you
think of a
food chain
of your
own?

26. Energy flow in food chain
Where do living organisms obtain their
energy to live from?
SUN
• If plants are eaten by 1st level consumer, the
energy is transferred to the 1st level consumer
• If 1st level consumer is eaten by 2nd level
consumer, the energy is transferred to the 2nd
level consumer
• And so on…

27. What is a food web?
A food web is an interlocking pattern of food chains

28. ECOLOGICAL PYRAMID
Definition:
A graphical presentation of the
relationship between different organism in
an ecosystem based on who eats whom and
also represent the flow of energy

29. TYPES
Pyramid of numbers
The number of each species in the food
chain in a habitat is estimated
Pyramid of biomass
The amount of matter in a body is
found by drying it to remove all water
and then using scales to find the mass.

30. THANK YOU