Ecosystems. Flow of energy topic in science 10

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Ecosystems
Flow of Energy & matter in
Ecosystems
Grade 10- Third Quarter

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Teacher:
Teacher Patch!

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🐍 Identify the flow of energy and matter in the ecosystem
accurately.
🐍 Relate the flow of energy and matter in their daily lives
correctly.
At the end of this Lesson

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Activity:
Get one whole sheet of paper
and then draw at least 5 living
organisms that you see everyday.

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PUZZLE TIME!

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1. E_OS_ST_M
2. CON_M_ _RS
3. P_ODU_RS
4. FO_OD C_ AI_
5. FO_ D W_B
Fill in the remaining letters to form words

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1. ECOSYSTEM
2. CONSUMERS
3. PRODUCERS
4. FOOD CHAIN
5. FO0D WEB
ANSWERS:

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DISCUSSION

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An ecosystem is a geographic area where plants, animals,
and other organisms, as well as weather and landscape,
work together to form a bubble of life. Ecosystems
contain biotic or living, as well as abiotic factors, or
nonliving parts.

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All living things need energy to survive. Almost
all organisms on Earth get their energy from the
Sun, either directly or indirectly.

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Energy moves through an ecosystem in a single direction.
First, it flows from the Sun to autotrophs, or producers. Then,
it flows from producers to heterotrophs, or consumers. Energy
never flows backward from consumers to producers. For
example, a plant cannot consume and get energy directly from
a mouse. But, when a mouse dies, decomposers break down its
body and return the nutrients to the ecosystem. Nutrients
from the dead mouse may indirectly return to the plant
through the soil.

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In your own words,
what is a producer
and a consumer?

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The producer or autotroph is an organism that can
produce its own food using light, water, carbon
dioxide, or other chemicals. Because autotrophs
produce their own food, they are sometimes called
producers. Plants are the most familiar type of
autotroph.

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A heterotroph is an organism that eats other
plants or animals for energy and nutrients.
Heterotrophs are known as consumers
because they consume producers or other
consumers. Dogs, birds, fish, and humans are
all examples of heterotrophs

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How do you think matter
and energy flow in the
ecosystem?

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Energy and matter are often cycled
within a system, and different forms
of matter and energy are able to
interact.

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Food chains and food webs are used
to show the movement of energy and
matter through an ecosystem.
Energy and matter begin to move
throughout the ecosystem when a
producer uses photosynthesis to
create the sugar it needs to carry
out life processes.
Through Food Chains and Food webs..

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A food chain, as shown in figure 4, shows the step-by-step transfer of
energy and matter from one organism to another within an ecological
community

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What is the difference between food chain
and food web?

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A food chain outlines who eats whom. A food web is all of the food chains
in an ecosystem. Each organism in an ecosystem occupies a specific
trophic level or position in the food chain or web

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ACTIVITY NO. 2
GROUP YOURSELVES
INTO 5

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The group work will be called
“Beyond the Classroom”.
You be given a reading activity sheet
containing information about “Owls”.

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1. What hypothesis do you have regarding the death of these
owls?
2. What process would you follow to solve this mystery?
3. What empirical evidence would you gather to prove your
claim?
4. What solutions would you offer to help protect the owl
population?

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Short Quiz!

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1. Explain why the biomass decreases as you move up trophic levels. When would the
opposite be true?
2. Why are autotrophs on the bottom of the energy pyramid?
3. Explain why energy decreases as you move up trophic levels.
4. What is the main source(s) of energy for all living things?

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Assignment!
Illustrate your very own Food
Chain based from your
breakfast menu

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Thank you!