Transcript Food Chains & Energy Pyramids

Full Name – Today’s Poll question
Homeroom What do you dip a chicken nugget in?
Aims:
SWBAT trace energy from the sun through an
ecosystem by using food chains and an energy
pyramid.
Do Now:
1) What are decomposers?
2) Why aren’t vultures or humans decomposers?
3) Give one example of each of the following:
Herbivore
Carnivore
Omnivore
Aims:
SWBAT trace energy from the sun through an
ecosystem by using food chains and an
energy pyramid.
Agenda:
Entrance Procedures (7 min)
Food Chains [I do] (10 min)
Food Chains [We do] (10 min)
Food Chains [You do] (20 min)
Closing (5 min)
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 - Horse
Carnivore - Wolf
Omnivore - Bear
Hook
What’s happening
in this picture?
Food Chains [I do]
Food chains are diagrams that show which
_____________
organisms _______________.
eat each-other All food
the sun then move to
chains start with ________,
producers and finish with ___________
consumers
__________,
and then ______________.
decomposers
Food Chains [I do]
fewer
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 ____
lost in all transformations
animals at the top of the food chain have to
eat a lot more than the plants at the bottom.
Food Chains [We do]
Producer
Omnivore
Decomposer
1. What is the mouse’s prey? Grasshoppers
2. What is the mouse’s predator? Snakes
3. Where does the energy from the entire food
chain come from? The sun
Food Chains [We do]
Fish
Algae
4) What happens after the fish die?
They get eaten by the decomposer and repeat.
5) Would the phytoplankton be able to survive
without the algae?
No, they depend on the algae to survive.
6) What is the purpose of a food chain?
To show how energy moves through a
ecosystem (what eats what).
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) in
every transaction.
8) Draw #7 as a food chain:
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