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Goal #1: Feeding Relationships
I. Energy Flow)
All living things rely on plants for energy…
Q: Where do all the plants get their Energy?
The sun is the major input of energy for all life on Earth!
Without energy, living things can’t function!
The Sun!
“Self Feeders”AKA producers
Get energy from:Chemicals Sunlight
Known as:
Chemosyntheis PhotosynthesisEx: Hydrothermal Vent Ex: Green Plant
Autotrophs
“Other Feeders”AKA consumers
Definition: Organisms that must consume others to get energy.
5 types:
Heterotrophs
1. Herbivores – Eat Plants Only
2. Carnivores – Eat Animals Only
3. Omnivores – Eat Plants & Animals
4. Detritivores/ ScavengersEat dead/decaying matter & the decomposers eating it
5. DecomposersBreak down organic compounds
II. Food Chain
• A diagram that shows the one-way direction that energy flows through an ecosystem.
• Arrows are used to show which way energy is being transferred.
Energy flows through an ecosystem in one direction:
Raccoon
Frog
Grasshopper
Leaf
Copy this food chain!
Rules for making a food chain:1. Must always start with a producer.
2. Arrows must point to the one that is receiving the energy.
Raccoon
Frog
Grasshopper
Leaf
Now draw the arrows in the
correct direction!
Do not write this.Raccoon
Frog
Grasshopper
Leaf
Why would you not write the food chain this way?
Rules for labeling a food chain:
1. Levels of a food chain are called Trophic Levels2. The first trophic level is always a Producer
3. The remaining trophic levels are Consumers» 1st order consumer » 2nd order consumer» 3rd order consumer
Raccoon
Frog
Grasshopper
LeafLet’s Label:
1. the producer2. The consumers
4. After labeling the order, you should also label the type of consumers.
(herbivore/carnivore/omnivore/detritovore/decomposer)
http://www.pbs.org/parents/dinosaurtrain/videos/video-drscotttriceratops.html
Raccoon
Frog
Grasshopper
LeafLet’s Label:
3. The type of each consumer
Try This one – make & label!
Bacteria
Lion
Zebra
Grass
Analysis Questions
• How many trophic levels are in this food chain?
• Which trophic level is the lion in?• Which organism is the 1st order
consumer?• ….the 2nd order consumer?• ….the 3rd order consumer?
HW: C#1
Energy in the Ecosystem Worksheet
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