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5.9B: Food Webs
Organisms and Environments
Name: ______________________________ Date: ____________________________
Key Concept 1: All energy transferred through food chains and
webs is derived from the Sun.
Passage
The Sun is responsible for sustaining all life on Earth. That is because it is the
_____________ , or origin, of all energy that moves through food webs. The
Sun provides both ___________ and ____________ that helps plants make
their own food. Animals don’t use the Sun’s energy directly, but can eat other
___________ to get their energy. When energy moves, or is _______________
through food chains, we need to remember that the origin of all energy there
is from the ____________.
Word Bank
Sun heat
light
transferred
organisms source
Illustration
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5.9B: Food Webs
Organisms and Environments
Key Concept 2: Producers use the Sun’s energy to create their
own food through photosynthesis.
Passage
Plants are green because they contain chlorophyll. That ‘green stuff’ is an
indication that plants use the _________ energy to make their own food!
Imagine if we could do that, we would be able to have lunch just by
sitting outside on a sunny afternoon! Plants though carry out the process
called _______________ to make their food. Without plants, animals
would not be able to get energy, since animals cannot use the Sun’s
___________to make their own food.
Word Bank
energy Sun’s
photosynthesis
Illustration
© 2011 Rice University – All Rights Reserved
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5.9B: Food Webs
Organisms and Environments
Key Concept 3: Consumers and decomposers get their energy
from producers or other consumers
Passage
Although consumers and decomposers rely on other _______________
for their energy, the _____________ is actually the original source of all of
this energy. That is because consumers, such as a sheep, eat __________,
which produce their own food from the Sun’s energy. Decomposers,
such as bacteria, _____________, or recycle, the nutrients in dead
organisms and waste. So even though consumers eat plants or other
animals, the Sun is still the _____________, or origin, of energy in the
food web.
Word Bank
plants
organisms
source
decompose
Sun Illustration
© 2011 Rice University – All Rights Reserved
CLOZE ing
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Science!
5.9B: Food Webs
Organisms and Environments
Answer Key
The Sun is responsible for sustaining all life on Earth. That is because it is the source, or
origin, of all energy that moves through food webs. The Sun provides both heat and light
that helps plants make their own food. Animals don’t use the Sun’s energy directly, but
can eat other organisms to get their energy. When energy moves, or is transferred
through food chains, we need to remember that the origin of all energy there is from the
Sun.
Plants are green because they contain chlorophyll. That ‘green stuff’ is an indication that
plants use the Sun’s energy to make their own food! Imagine if we could do that, we
would be able to have lunch just by sitting outside on a sunny afternoon! Plants though
carry out the process called photosynthesis to make their food. Without plants, animals
would not be able to get energy, since animals cannot use the Sun’s energy to make their
own food.
Although consumers and decomposers rely on other organisms for their energy, the Sun
is actually the original source of all of this energy. That is because consumers, such as a
sheep, eat plants, which produce their own food from the Sun’s energy. Decomposers,
such as bacteria, decompose, or recycle, the nutrients in dead organisms and waste. So
even though consumers eat plants or other animals, the Sun is still the source, or origin, of
energy in the food web.
© 2011 Rice University – All Rights Reserved