Ecosytems

The Orangization of Ecosystems

100

Which of the following is an abotic factor in ecosystems?

A.bacteria

B.air

C.niche

D.grass

B.air

200

Which of the following is a biotic factor in an ecosystem?

A.water

B.a large rock

C.a rotting log 

D.tempature 

C.a rotting log

300

What is a habitat?

A.all the member of a community

B.many different species living in the same place

C.the role of an organism in its environment

D.the place where where an organism lives

D.the place where an organism lives 

400

Which of the following correctly lists the levels in an ecosystem from Largest to smallest?

A.ecosystem,community,population 

B.community,ecosystem,population

C.population,ecosystem,community 

D.ecosystem,population,community 

D.ecosystem,population,community

500

If an ecosystem losess an organism who will be affected?

A.plants

B.carnivores

C.herbivore

D.all of the above 

D.all of the above 

The flow of energy of Ecosystems

100

Which of the following is an fist-order consumer?

A.rabbit

B.fox

C.hawk

D.fern

A.rabbit

200

An organism that performs photosynthesis is called

A.a decomposer

B.a consumer

C.an autotroph

D.a heterotroph

C.an autotroph

300

Which organism in the food chain shown in a second-order consumer?

A.snake

B.frog

C.cricket

D.grass

B.frog

400

A animal that only eats meat is called a?

A.consumer

B.producer

D.decomposers

C.heterothph

A.consumer

500

How much energy from one trophic level is transferred to the next

A.None of the energy is transferred.

B.About 1% of the energy is transferred.

C.About 10% of the energy is transferred.

D.All of the energy is transferred

C.About 10% of the energy is transferred

The Cycling of Matter in Ecosystems

100

Which of these is one role of plants in the carbon cycle?

A.Plants take in the oxygen and release carbon dioxide

B.Plants take in carbon dioxide and pass it on directly to animals 

C.Plants take in carbon dioxide released by other organisms 

D.Plants use carbon dioxide to make nitrates

B.Plants take in carbon dioxide and pass it on directly to animals 

200

The process by which  bacteria return nitrogen gas to the atmosphere is called

A.reproduction

B.denitrifiction

C.nitrogen fixation

D.transpiration

C.nitrogen fixation

300

What role does evaporation play in the water cycle?

A.It heats surface water

B.It causes precipitation to form as rain,snow,hail, or sleet

C.it moves water from Earth's surface into the atmosphere

D.It moves water from Earth's surface into underground areas

A.It heats suface water

400

Which is the process by which water vapor changes to liquid water?

A.transpirtion

B.percipitation

C.runoff

D.condensation

D.condensation

500

What is another way that water get's into to the atmosphere that involves plants?

A.transpiration

B.Evaporation

C.condensation

D.precipitaion

A.transpiration

Other Realationships in Ecosystems

100

Which of the following is a symbiotic relationship in which both organisms benefit?

A.mutualism

B.commensalism

C.competition

D.parasitism

A.mutualism

200

Which of the following pairs of organisms are most likely to have a predator/prey relationship?

A.dog and tapeworm

B.rhinoceros and oxpecker bird

C.spider and fly

D.fungus and green alge

C.spider and fly

300

A parasite infects an animal and it is harming it what relationship is it?

A.parasitism

B.commensalism

C.mutualism

D.predation

A.parasitism

400

whithin an ecosystem,grasses are most likely to compete with 

A.grasses only

B.grasses and other plants 

C.animals only

D.abotic factors 

B.grasses and other plants 

500

The cattle egret perches on a buffalo's and is carried from one location to another.The egret eats insects flushed from the grass as the buffalo moves.The buffalo is neither helped nor harmed.This is an example of 

A.mutulism

B.commensalism

C.parasitism

D.predation

B.commensalism