Students will examine the dependence of organisms on one another and their environments.

How do organisms relate to one another in an environment for the purposes of energy exchange?

ESSENTIAL QUESTIONS

IDENTIFY ROLE IN FOOD CHAIN.

A food chain is a way to describe the feeding relationships between

different organisms.

CREATE A FOOD CHAIN FLOW MAP

And what is a feeding relationship?

DESCRIBE PREDATOR AND PREY RELATIONSHIPS

A feeding relationship describes who is eating what in a particular

habitat.

GIVE 3 EXAMPLES

Organisms are able to use energy directly from the sun to make their

own food are called autotrophs.

TRUE OR FALSE

All food chains start with ________because they can produce food by using energy from the sun.

FILL IN THE BLANK

1. Organisms in the 2nd step up the food chain are called the ________.

Hint: These are animals that feed directly on plant material.

FILL IN THE BLANK

What are animals that eat plants called?

GIVE 2 EXAMPLES

WHO EATS HERBIVORES?

DESCRIBE COMMENSALISM

_________that eat primary consumers, are called secondary

consumers.

DESCRIBE MUTUALISM

DESCRIBE PARASITISM

DEFINE SYMBIOSIS

The arrows between each item in the chain always point in the direction of energy flow- in other words, from the

food to the feeder.

Give an example.

FOOD CHAIN

The organisms at the top of food chains (such as wolves) are very small in

number compared to those lower down (such as oaks)

OR Why are there few apex hunters but a lot

of grass?

EXPLAIN WHY

What about animals that eat both plants and animals, such as bears

and humans? What are they called?

GIVE AN EXAMPLE

omnivores.

DEFINE AND GIVE THREE EXAMPLES

Detritivores or decomposers

DEFINE AND GIVE 2 EXAMPLES

EXPLAIN HOW FOOD WEBS WORK

1.An ________________ is a place where plants and animals interact with the environment.2.Green plants are also called ________________ because they make their own food.3.Animals that cannot produce their own food are called ________.4.________________ are organisms that eat other animals.5.A food chain or food________________ illustrates the feeding relationships in a place.6.Each level in a food chain is called a ________________ level.7.________________ are important organisms that break down dead organisms.

Chapter 18