1. Full Name – 2021 3/07/2012
Homeroom Freedom is not free.
Aims:
SWBAT show how organisms in an ecosystem are
connected by creating and using food webs.
Do Now:
1. Complete this food chain by drawing what is
missing, both at the beginning and the end.
2. What is the purpose of a food chain?

2. Aims:
SWBAT show how organisms in an
ecosystem are connected by creating and
using food webs.
Agenda:
Entrance Procedures (7 min)
Food Webs [I do] (10 min)
Food Webs & Chains [We do] (10 min)
Try it! [You do] (20 min)
Closing (5 min)

3. Do Now:
1. Complete this food chain by drawing
what is missing, both at the beginning
and the end.
2. What is the purpose of a food chain?
To show how energy moves through
an ecosystem (what eats what).
Producer Omnivore DecomposerProducer Omnivore Decomposer
The sun Decomposers

4. Hook
Is everything connected? Why or why not?

5. Read It!
Most ecosystems contain many different kinds
of plants and animals. Each plant or animal is
part of more than one food chain. When two
or more food chains overlap, they form a food
web. In a food web, at least one plant or
animal from each food chain is part of another
food chain.
For example, the leaves, grasshopper, frog and
snake are all part of one food chain. They are
also part of a food web. In the food web
shown, the frog shown is not only prey for the
snake, it is also prey for the owl as well. The
frog is part of a second food chain that has the
leaves, grasshopper, frog and owl. The owl and
the snake may compete with each other for
this source of food.

6. Food Webs
A __________ is a diagram that shows all the
___________ in an ____________ connected
together.
We __________ food webs by tracing the
energy from the ___________ all the way up
the food web to the top predators
(_________ and ___________).
food web
organisms ecosystem
can follow
producers
carnivores
omnivores
Remember, all ____ is ___________!
life connected

7. Food Webs [We do]
Circle the organisms from the food chain in
the food web.
FOOD CHAIN FOOD WEB

8. Food Webs[We do]
How to follow a food web:
1) Start with a __________ (or the sun).
2) Follow the one of the _______ from that
producer to an organism that ________.
3) Continue following the arrows until you
get to the ____________________ or the
______________.
This is your food chain.
producer
arrows
eats it.
apex (top) predator
decomposers

9. Food Webs [We do]
FOOD CHAIN FOOD WEB
1)
2)
3)
FOOD CHAIN FOOD WEBD CHAIN FOOD WEB
FOOD CHAIN FOOD WEB
FOOD CHAIN FOOD WEB

10. Exit Slip:
1) What’s the difference between a food chain
and a food web?
2) What’s one situation where it would be
better to use a food chain?
3) What’s one situation where it would be
better to use a food web?
Homework:
Food Webs
Sneak Preview!__________________
Keystone Species