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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