How do organisms interact? Lesson 1 Energy Flow in Ecosystems Lesson 2 Relationships in Ecosystems Lesson 3 Adaptation and Survival
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How do organisms interact?
Lesson 1
Energy Flow in Ecosystems
Lesson 2
Relationships in Ecosystems
Lesson 3
Adaptation and Survival
Chapter 3 Menu
ecosystem
population
community
food chain
food web
predator
prey
energy pyramid
Lesson 1 Splash
What is an ecosystem?
An ecosystem includes all the living and
nonliving things in an environment.
Lesson 1 a
How are food chains alike? Energy flows in
one direction in
food chains.
The energy
in a food
chain starts
with the
Sun.
Producers are at
the base of every
food chain.
primary
consumer
decomposer
producer
secondary
consumer
Lesson 1 b
What are food webs made of? Food webs are
networks of food
chains that have some
links in common.
decomposer
Lesson 1 c
How do energy pyramids compare?
Energy pyramids show
that it takes a huge
number of organisms to
support an ecosystem.
Lesson 1 d
How does change affect a food web?
Changes to populations
in a food web set off a
chain of events that can
affect all the organisms
in a food web.
red tide algae
Lesson 1 e
How do producers and consumers
obtain energy?
Main Idea
Producers get energy from
the Sun.
Consumers eat plants and
animals to get energy.
Lesson 1 Main Idea Review
___________ are organisms that are eaten
by other animals.
The path that energy and nutrients follow
in an ecosystem is called a ___________.
An ___________ includes all living and
nonliving things in an environment.
A ___________ is an animal that hunts
other animals for food.
ecosystem prey
Vocabulary
food chain predator
Prey
Lesson 1 Vocab a Review
Vocabulary
A _____________ is a network of food
chains that have some links in common.
A _____________ includes all members of
a single species.
An ______________ is a diagram that
shows the amount of energy available
at each level of an ecosystem.
A _____________ includes all the living
things in an ecosystem.
community population energy pyramid food
web
Lesson 1 Vocab b Review
Sunlight hits plants and
helps them make food. Sequence
End of Lesson
Describe the events
that take place as
energy from the
Sun travels through
an energy pyramid.
Plant food energy is
eaten by an herbivore.
Herbivores are eaten
by a carnivore.
Lesson 1 GO Review
Lesson 1 Vocab a
Lesson 1 Vocab b
Lesson 1 Vocab c
Lesson 1 Vocab d
Lesson 1 Vocab e
Lesson 1 Vocab f
Lesson 1 Vocab g
Lesson 1 Vocab h
limiting factor
carrying capacity
habitat
niche
symbiosis
mutualism
commensalism
parasitism
Lesson 2 Splash
Why do organisms compete?
Organisms compete with one another as they
struggle to get their share of limited resources
such as food, water, space, sunlight, or shelter.
Lesson 2 a
How do organisms avoid competition?
An organism avoids competition by having a specific
territory and a unique role within its ecosystem.
Lesson 2 b
How do organisms benefit from interactions?
Interdependence is the reliance of organisms
on other organisms for their survival.
Symbiosis is a
relationship between
two or more kinds of
organisms that lasts
over time.
Two kinds of symbiotic relationships
are mutualism and commensalism.
Lesson 2 c
lamprey
What are parasites?
Parasitism is a symbiotic
relationship in which one
organism benefits and the
other is harmed.
Parasites live on host
organisms and survive
by using the host
organism’s body for
nutrients.
tick
tapeworm
Lesson 2 d
How can biotic and abiotic factors
affect the size of a population?
Main Idea
Both can be limiting factors. Biotic factors
can include competing organisms. Abiotic
factors can include temperature, which will
determine what can grow.
Lesson 2 Main Idea Review
______________ is a relationship between two
or more kinds of organisms that lasts over time.
______________ is a symbiotic relationship where
one organism benefits and the other is harmed.
The _______________ is the greatest number of
individuals within a population that an ecosystem
can support.
A symbiotic relationship that benefits one organism
without harming the other is called ______________.
carrying capacity
Vocabulary
parasitism symbiosis
Symbiosis
commensalism
Parasitism
Lesson 2 Vocab a Review
A _____________ is the physical place where
an organism lives and hunts for food.
A _____________ is any source that
restricts the growth of populations.
A _____________ is the special role
that an organism plays in a community.
A symbiotic relationship that benefits
both organisms is called _____________.
habita
t
Vocabulary
mutualism niche limiting factor
Lesson 2 Vocab b Review
predator
population
decreases
different predator
enters the
community
Infer
End of Lesson
A predator suddenly decreases
even though the prey stays the
same. Besides disease, what
could explain this change?
some of old
predator’s prey
is taken
Lesson 2 GO Review
Lesson 2 Vocab a
Lesson 2 Vocab b
Lesson 2 Vocab c
Lesson 2 Vocab d
Lesson 2 Vocab e
Lesson 2 Vocab f
Lesson 2 Vocab g
Lesson 2 Vocab h
adaptation
camouflage
protective
coloration
protective
resemblance
mimicry
Lesson 3 Splash
What is adaptation?
Adaptations are physical structures
or behaviors that help an organism
survive in its environment.
Lesson 3 a
What are some plant adaptations?
scented flowers to attract pollinators
leaves that drain excess water
waxy stems to prevent water loss
Lesson 3 b
What are some animal adaptations?
thick fur and extra
body fat for warmth
streamlined bodies in
water environments
camouflage
Lesson 3 c
What is mimicry?
Mimicry is an adaptation in
which an animal is protected
from predators because it
looks like a dangerous or
unpleasant animal.
Lesson 3 d
What are structural and
behavioral adaptations?
Main Idea
Structural and behavioral adaptations
give organisms an advantage in
surviving and reproducing in their
environments.
Lesson 3 Main Idea Review
___________________ is a type of camouflage
in which the color of an animal helps it blend
with its background.
Any coloring, shape, or pattern that allows
an organism to blend with its environment
is called ___________________.
Matching the color, shape, and texture of an
environment is called _____________________.
camouflage protective coloration
Vocabulary
protective resemblance
Protective coloration
Lesson 3 Vocab Review a
An adaptation in which an animal is protected
against predators by its resemblance to an
unpleasant animal is called ___________.
An ___________ is any characteristic that
helps an organism survive in its environment.
adaptation
Vocabulary
mimicry
Lesson 3 Vocab Review b
How do snapping
turtles catch fish?
structures for swimming,
gills for oxygen
Problem and
Solution
End of Lesson
the fish is caught
How are aquatic
animals able to
survive in water?
Lesson 3 GO Review
Lesson 3 Vocab a
Lesson 3 Vocab b
Lesson 3 Vocab c
Lesson 3 Vocab d
Lesson 3 Vocab e
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