Organisms that break down dead plants and animals; they are the "recyclers" of an ecosystem

A factor that controls the size of a population - for example, availability of water or sunlight

This population of which the following organisms would most likely decline if small animals like rats, rabbits and snakes were eliminated from an ecosystem.
a. earthworms
b. grasses
c. hawks
d. mushrooms

The complete removal of decomposers from an ecosystem will have the greatest effect of which of the following:
a. the spread of disease
b. the availability of water
c. the recycling of nutrients
d. the distribution of organisms

What is the job of decomposers?

A working unit made up of organisms interacting with both living and non-living factors

Organisms that create their own food through sunlight

Which of the following organisms produce energy from sunlight
a. worm
b. rabbit
c. hawk
d. grass

Energy moves through and ecosystem in the form of
a. water
b. oxygen
c. sunlight
d. food

What is the most common know type of decomposers?

All of the non-living parts of an ecosystem

Organisms that obtain their food by eating

Most of the bacteria in a forest ecosystem are best classified as which of the following types of organisms?
a. consumers
b. decomposers
c. predators
d. producers

Light, water, temperature and food are all examples of:
a. abiotic factors
b. biotic factors
c. habitats
d. limiting factors

Which of the following biotic factor makes energy from sunlight:
a. worm
b. rabbit
c. hawk
d. tree

All of the living parts of an ecosystem

The study of living, non-living and human-made parts of an ecosystem

Lightning from a thunderstorm strikes a tree that falls to the forest floor and dies. During the next few years the dead tree undergoes many changes. What organisms are most likely responsible for the biological and chemical changes to the trees.
a. con

Algae are producers who make their won energy through:
a. soil
b. photosynthesis
c. decomposition
d. eating plankton in the ocean

Does energy move through and ecosystem through sunlight or food?

A location where salt water meets fresh water

Areas of the planet that have similar characteristics, such as climate, amount of rainfall and plant species

Which of the following best describes a role of mushrooms in ecosystems?
a. capturing energy from sunlight
b. consuming living plant material
c. taking energy from animal hosts
d. breaking down dead plant material

All are biotic factors except:
a. pine trees
b. raccoons
c. sunlight
d mockingbirds

Food webs are simple or complex.