Do Now:1) What are decomposers? Bacteria and fungi that eat dead organisms.2) Why aren’t vultures or humans decomposers?We’re not decomposers because only tiny things can be decomposers!3) Give one example of each of the

following: Herbivore - HorseCarnivore - WolfOmnivore - Bear

Hook

What’s happening

in this picture?

Food Chains [I do]_____________ are diagrams that show

which organisms _______________. All food chains start with ________, then move to __________, and finish with ___________ and then ______________.

Food chainseat each-other

the sunproducers consumers

decomposers

Food Chains [I do]Each step up the food chain there are ______ animals. (Giraffes eat a lot of grass, and a lion eats hundreds of giraffes over its life time). This is shown visually in an energy pyramid. Because energy is ____ in all transformations animals at the top of the food chain have to eat a lot more than the plants at the bottom.

fewer

lost

Food Chains [We do]

1. What is the mouse’s prey? 2. What is the mouse’s predator? 3. Where does the energy from the entire food chain come from?

Grasshoppers Snakes

Producer Omnivore Decomposer

The sun

Food Chains [We do]

4) What happens after the fish die?

5) Would the phytoplankton be able to survive without the algae?

6) What is the purpose of a food chain?

They get eaten by the decomposer and repeat.

No, they depend on the algae to survive. To show how energy moves through a ecosystem (what eats what).

Fish Algae

Food Chains [We do]

7) These organisms are placed in an energy pyramid. Why are there so many plants but so few birds?Energy is lost (as heat)

inevery transaction.

8) Draw #7 as a food chain:

Do the rest on your own!

Exit Slip:1) Why do carnivores at the top of the

food chain have to eat so much more than herbivores at the bottom?

2) What is the source of almost all energy on earth?

Homework:Food Chains

Sneak Preview!__________________Food webs