7th grade lesson on food chains and webs

1. Mind Stretcher 8-17-17
Just write the food chain w/
ARROWS and answer #2 in
complete sentence!!
Grass FrogGrasshopper Snake Hawk

2. Types of ConsumersKey Terms Description Examples
Food Web
Interconnected food
chains; Complex diagram
showing feeding
relationships
Food Chain
Energy
Pyramid
A SIMPLE diagram
showing flow of energy
from ONE organism to
another
A triangular diagram
showing an ecosystem’s LOSS
of energy & its BIOMASS
The levels found on an
energy pyramid or
within food webs
Trophic
Levels

3. Food Chain
Wait a second…
how do producers get their energy?
Notice how it is linear…
Food chains are very simple!

4. Energy Pyramid
Based on the data
shown here…what
PERCENTAGE of
energy moves up
the trophic levels?
10%

6. “Food Chains for Kids”- 5 min. video clip
https://youtu.be/hLq2datPo5M

7. FOOD CHAIN Information
Consumers: Get ENERGY by EATING:
Rabbit Grass, Grain, Leaves
Leaf Beetle Grass, Leaves
Mouse Grain
Frog Leaf Beetle
Snake Frog, Mouse, Rabbit
Hawk Snake, Frog, Mouse, Rabbit
Producers: How they get ENERGY:
Leaves/Grain/Grass Use sun’s energy to make their
own food

8. Let’s Create a Food Chain!
•Use the organism cards provided to create two
SIMPLE food chains.
•Make sure the ARROWS point to
Who GETS the ENERGY!!
•When you are done, wait quietly for the timer to
go off so we can share your ideas! (up to 5 min.)

9. Let’s Create a Food Web!
•Now try combining more organisms to make a FOOD
WEB.
•Make sure ARROWS point to Who GETS the ENERGY!!
•* You may use your eraser to draw arrows on your lab
table connecting the organisms!
•When you are done, raise your hand to get it approved.
•Draw the web onto a sheet of notebook paper using
WORDS & ARROWS only! (No pictures required!)