File - Mrs. Kellogg
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Transcript File - Mrs. Kellogg
Life Science –
th
4
Grade
L.O. I will describe food
chains in detail.
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
*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
*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
1st type of consumer Herbivores
*Eat only producers -plants
butterfly
grasshopper
mouse
bison
2nd type of consumers –
Carnivores
*Only eat other animals – consumers
snake
hawk
coyote
3rd type of consumer –
Omnivores
Animals that eat both producers and
consumers
raccoon
grizzly bear
pig
And don’t forget HUMANS!
Food Chain
energy
flows to
owl
*DEPEND ON EACH OTHER,
But also COMPETE WITH EACH OTHER
energy
flows to
energy
flows to
grass
Producer
1st
Mouse
Consumer
Herbivore
coyote
DAY 2
Organism
– a living thing
Cell is basic unit that makes up
all living things
Microorganism-
organism that
cannot be seen without
microscope
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
*Fungi are organisms – examples are
*mushrooms and mold
Mold can spoil food, but mushrooms are
yummy to eat and are good for you
Producer (plant/tree) dies
Microorganisms start using dead producer
to grow, but in the process are breaking
down the dead producer
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
*Bacteria helps to recycle matter and
nutrients from dead plants back into the
soil
So all food chains end with decomposers
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
What is an ecosystem?
Ecosystems are made up of living and
non-living things that interact in an area
**In a tropical rainforest:
Colorful birds
Fruit and nut trees
Warm all the time
Lots of rain
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.
*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