1. Living Things Need Energy
Chapter 2 Section 2

2. Getting Energy…
Organisms have to have energy- at all times- to survive.
Energy comes from food.
Plants use the sun to make food and energy through photosynthesis.
Animals get their food and energy
from eating other organisms.

3. Producers
Organisms that can make their own food (usually through photosynthesis).

4. Consumers Organisms that cannot make their own food
Consumers eat other organisms to get energy and food.
There are three types of consumers:
Herbivores
Carnivores
Omnivores

5. Consumer 1: HERBIVORE Vegetarians (They eat vegetables and plants.)
Examples:
Rabbits
Deer
Giraffes

7. Carnivores are animals that eat other animals.
Consumer 2: Carnivore
Carnivores are animals that eat other animals.
Frogs (eat insects)
Spiders
Lions
Dogs

9. *Scavengers are a type of omnivore that eats dead plants and animals.
Consumer 3: Omnivore
Animals that eat plants and animals
Examples:
Pigs
Humans
Bears
Racoons
Owls
Vultures*
*Scavengers are a type of omnivore that eats dead plants and animals.

11. Decomposers
Organisms that get energy by breaking down dead organisms (including waste).
They take the stored energy from the dead material, while producing simple materials, like carbon dioxide and water.
Examples:
Fungi
Bacteria
Earthworms

13. FOOD CHAIN!
This is a model of one specific feeding relationship in an ecosystem. (A CHAIN THAT SHOWS WHO EATS WHO.)
Example:
Shrubs are food for deer and the deer is food for a mountain lion.
So you food chain would look like this:

14. Mountain Lion = Carnivore
Eats
Deer = Herbivore
Eats
Shrub = Producer

15. FOOD WEB!
This is a more advanced food chain- that shows what ALL organisms eat and what eats them in an ecosystem.
(LOOKS LIKE A SPIDER WEB!!!)

16. Food Web example

17. Part II: Symbiosis

18. Symbiosis Any close relationship between organisms
There are three types of relationships:
Mutualism
Commensalism
Parasitism

19. This is a nice relationship.
Mutualism
A relationship where both organisms benefit (get something good).
I agree. It is lovely.
This is a nice relationship.

20. Mutualism Example
Fruit-eating birds will eat the fruits off of plants. The fruit is food for the bird, but the bird also spreads the plant’s seeds (by pooping them out while flying). This allows the plants to grow in different areas. Both organisms are happy!

21. Commensalism
A relationship where one organism benefits but the other is unaffected or doesn’t even know.
I don’t even know who you are.
I love our relationship!

22. Commensalism Example
Hummingbirds travel from flower to flower, drinking nectar for food. Mites (small bugs) that also eat nectar, climb into the nose hole of the hummingbird and travel from flower to flower- also drinking nectar! The hummingbird doesn’t even know the mite is there. The mite benefits, but the hummingbird is unaffected.

23. Ha Ha. This relationship is giving me all I need.
Parasitism
A relationship where one organisms benefits and the other is injured, hurt, or killed.
Ha Ha. This relationship is giving me all I need.
It’s killing me.
Literally.

24. Parasitism Example:
Heartworms will live in the right side of a dog’s heart. The worms attach to the heart and grow. They will block the heart cavity and will cause death.