Full Name – 2021 3/07/2012Homeroom 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?

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)

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).

The sun Decomposers

Hook

Is everything connected? Why or why not?

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.

Food WebsA __________ 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 weborganisms ecosystem

can followproducers

carnivoresomnivores

Remember, all ____ is

___________!  

life connected

Food Webs [We do]

Circle the organisms from the food chain in the food web.

FOOD CHAIN

FOOD WEB

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

arrowseats it.

apex (top) predatordecomposers

Food Webs [We do]

FOOD CHAIN

FOOD WEB

1)

2)

3)

FOOD CHAIN

FOOD WEB

FOOD WEB

FOOD WEB

FOOD WEB

FOOD WEB

FOOD CHAIN

FOOD CHAIN

FOOD CHAIN

FOOD WEB

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