Question of the day, in your

vocabulary notebook, next page

Recall the bunny simulations from last week and

answer the following questions in your notebook:

1. Did the bunnies exhibit J-curve population growth

in any of the scenarios from Wednesday or

Thursday? Explain why or why not.

2. Did the bunnies exhibit S-curve population

growth in any of the scenarios from Wednesday

or Thursday? Explain why or why not.

Feeding Relationships, Food Chains, Food Webs

Headings Vocabulary

Important Info

Feeding Types

1. Autotrophs:a. Self feeders,

produce their own food throughphotosynthesis● Transformation of

light energy to chemical energy to make food in the form of glucose

b. Examples: plants, algae

2. Heterotrophs:a. Depend on other organisms for their

food

1. Herbivore: Eats only plants

2. Carnivore: Eats only meat

3. Omnivore: Eats both plants and meat

3. Decomposers:

a. Break down and absorb nutrients from dead, decaying organisms

b. Examples: mushrooms and bacteria

• Work with your group to write 1 question about Feeding Types (level 3 question)

● Level 3 words include:APPLYBUILDCHOOSECONSTRUCTDEMONSTRATEDEVELOPDRAWEXPERIMENTILLUSTRATE

PLAN

MAKE USE OF

MODEL

ORGANIZE

SELECT

SOLVE

UTILIZE

Symbiosis

a. close, permanent relationship between organisms

b. Three major types:

1. Commensalism

2. Mutualism

3. Parasitism

1) Mr. Fungus is ready to greet our friend the algae

2) Friend alga cell is prepared to

greet Mr. Fungus

3) The Lichen is created between the fungus and the alga

Commensalism:a. A feeding relationship in which one organism benefitsand the other is not affected.

b. Example: Remoras that live on or around a shark’s mouth.

*Remora benefits from the scraps of food that fall from the shark’s mouth and the shark is not affected.

Feeding Relationships

Mutualism:a. Both organisms benefit from

the relationshipb. “you scratch my back and I

scratch yours”c. Example: tickbirds eat

parasites off of the back of zebras. The tickbirds get fed and the zebra gets cleaned.

Parasitism:a. One organism benefits

and the other is harmed

b.Example: tapeworm living inside an organism’s intestine (may cause death)

c. Example: flea living on a dog

• Work with your group to write 2 questions about Feeding Relationships (level 3 question)

● Level 3 words include:APPLYBUILDCHOOSECONSTRUCTDEMONSTRATEDEVELOPDRAWEXPERIMENTILLUSTRATE

PLAN

MAKE USE OF

MODEL

ORGANIZE

SELECT

SOLVE

UTILIZE

Also write a

SUMMARY

Create a WANTED ADDue Wedensday!

On a separate sheet of paper, create a Wanted Ad based on

commensalism, mutualism, or parasitism

Requirements:

• Written from the point of view of the organism that

benefits

• Include:

1. Catchy Headline describing job

2. A line describing the relationship

3. A line about you and your great qualities

4. A line about the organism you need for the job

5. Why you need this service

6. What you will give in return for their service.

• Your ad should be colorful and should include pictures.

Sample Ad

In your composition book, draw and fill out this table (on page the next available page)

– you must look up the items in green:

Autotroph Definition (you write this!)

The word in another

language

Root:

auto = self

troph = food

ILLUSTRATE Use in a sentence

Food Chains and Food Webs1. Food Chain:

a. model showing the movement of energy through the ecosystem

b. Consists of Producers, Consumers, and Decomposers

Food Chains and Food Webs● Producer: living organisms that take non-living matter (like

minerals and gases) from the environment and use them to support life (Example: plants). These are the first organisms in the food chain.

● Consumer: living things that need producers to be their food.

– EX: (Herbivores, carnivores, and omnivores)

● Decomposer: living things which feed off of dead plants and animals to reducetheir remains to minerals and gases again

Food Chains and Food Webs2. Food Web:

a. More complicated and more realistic than a food chain

b. Shows more than one possible food source for each organism

c. Steps in food chains or food webs are called trophic levels.

d. Producers make up the first trophic level

e. Consumers make up second, third, or highertrophic level.

• When you read a food chain or food web, the

arrows point from what is being eaten to

what it is eaten by.

Ex.: mouse → hawk;

the mouse is

EATEN BY

the hawk

Arrows are the

Flow of

ENERGY

• Work with your group to write 3 questions about Food Chains and Food Webs (level 4 question)

Level 4 words include:ANALYZECATEGORIZECLASSIFYDISCOVERDIVIDEEXAMINEGROUPINSPECTSEQUENCE

SIMPLIFY

DISTINGUISH

DISTINCTION

RELATIONSHIPS

FUNCTION

ASSUME

CONCLUDE

3rd trophic level

4th trophic level

5th trophic level

1st trophic level

Each ___ in the chain represents one trophic level.

grass

grass-

hopper

frog

snake

eagle

Trophic Level:

It is the _______ an organism occupies in a food chain. position

link

2nd trophic level

phytoplankton

zooplankton

small fish

larger fish

shark

However, as energy is moved from one trophic level to the next, only ___ % of the energy makes it to the next level.

TROPHIC LEVELS

grass

grass-

hopper

frog

snake

eagle

As organisms eat one another, ______ is transferred up the food chain.

energy

10

This means that ___% of the energy is lost,

1000 kcal

100 kcal

10 kcal

1 kcal

0.1 kcal

- 900 kcal

- 90 kcal

- 9 kcal

- 0.9 kcal

90mostly in the

form of _______ (from metabolic processes like cellular respiration)

heat

ECOLOGICAL PYRAMIDS

These are diagrams that represent each trophic level according to its __________ .energy

The amount of energy always _________ as you move up trophic levels.

decreases

This pyramid indicates the amount of ______ that is present in each trophic level.

energy

� from grass to sheep, loss is about 90%!

10% Original

Energy! 1% Original

Energy!

100% Energy

Available

HEAT

90%

HEAT

90%

Apex Predator: animal with no known natural enemies!

Ecological Pyramid

• Which level has the most energy?

• Which level has the most organisms?

• Which level has the least organisms?

• Which level has the least energy?

● Usually no more than 5 trophic levels since 6th level would have

very little energy to keep it alive

Energy Flow and Eating Habits● Meat eating (higher on the trophic pyramid) uses more energy than eating veggies

● 90% of the grain that we grow is used to feed livestock

● 100 kg of grain can feed:– 10 kg of cow and 1 kg of steak eating people

– 10 kg of grain eating people (10x more)

Work with your group to write 2 questions about Trophic Levels(level 4 question)Level 4 words include:ANALYZECATEGORIZECLASSIFYDISCOVERDIVIDEEXAMINEGROUPINSPECTSEQUENCE

SIMPLIFYDISTINGUISHDISTINCTIONRELATIONSHIPSFUNCTIONASSUMECONCLUDE

1. Answer the review questions2. Write a summary3. Complete the trophic level worksheet and turn

in by the end of class!

Create a WANTED ADDue Wedensday!

On a separate sheet of paper, create a Wanted Ad based on

commensalism, mutualism, or parasitism

Requirements:

• Written from the point of view of the organism that

benefits

• Include:

1. Catchy Headline describing job

2. A line describing the relationship

3. A line about you and your great qualities

4. A line about the organism you need for the job

5. Why you need this service

6. What you will give in return for their service.

• Your ad should be colorful and should include pictures.