1. L.O. I will describe food chains in detail.
Life Science – 4th Grade
L.O. I will describe food chains in detail.

2. Food Chains Shows path of food energy
*The first link in a food chain is a producer.
All living things need energy to survive
They get energy from food
Some eat plants
Some eat other animals
Plants don’t eat food, they make their own

3. *Producers *Plants and trees are the producers
*main source of energy in food chain
Use sunlight to make food - Photosynthesis
Get their energy from the sun
*Original source of energy for living things is the sun

4. *Consumers *Animals that consume or eat They eat other animals and/ or
They eat producers (plants)
* Energy flows from the sun to PRODUCERS (plants producing food) to CONSUMERS
*The other 3 links in a food chain are Herbivores, Carnivores, and Omnivores

5. 1st type of consumer - Herbivores
*Eat only producers -plants
butterfly
grasshopper
mouse
bison

6. 2nd type of consumers – Carnivores
*Only eat other animals – consumers
snake
hawk
coyote

7. 3rd type of consumer – Omnivores
Animals that eat both producers and consumers
raccoon
grizzly bear
pig
And don’t forget HUMANS!

8. Food Chain owl *DEPEND ON EACH OTHER, But also COMPETE WITH EACH OTHER
energy flows to
owl
energy flows to
*DEPEND ON EACH OTHER,
But also COMPETE WITH EACH OTHER
energy flows to
grass
Producer
Mouse
1st Consumer
Herbivore
coyote

9. DAY 2

10. Organism – a living thing
Cell is basic unit that makes up all living things
Microorganism- organism that cannot be seen without microscope

11. Some microorganisms have one cell – algae, amoeba, yeast, and bacteria
Bacteria are microorganisms found in all living organisms and everywhere on earth
Some bacteria can be bad and make you sick – but most are good

12. *Fungi are organisms – examples are *mushrooms and mold
Mold can spoil food, but mushrooms are yummy to eat and are good for you

13. Producer (plant/tree) dies
Microorganisms start using dead producer to grow, but in the process are breaking down the dead producer

14. Decomposers They are consumers
*They break down the remains of dead organisms
*So, bacteria and fungi helps in decomposition of a fallen tree
They connect both ends of the food chain
maggots
mushrooms
bacteria
earthworms

15. *Bacteria helps to recycle matter and nutrients from dead plants back into the soil
So all food chains end with decomposers

16. Decomposers break down dead stuff, recycling nutrients back into soil to be used by new plants, starting the process all over again
*Microorganisms are important to the ecosystem

17. What is an ecosystem?
Ecosystems are made up of living and non-living things that interact in an area

18. **In a tropical rainforest:
Colorful birds
Fruit and nut trees
Warm all the time
Lots of rain

19. *Non-living is water, air, soil, and light
In a desert:
Cactus
Lizards
Snakes
Tortoise
*Non-living is water, air, soil, and light
*The differences in non-living elements determine life or death in an ecosystem.

20. *2 ways animals can help in the dispersal (spreading) of seeds so plants can grow in different areas
*Birds drop them
*Seeds stick on animal fur – animal drops seeds in other places, new plants grow there