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6th Grade ScienceEcosystems

Ongoing Assessment: Students save the following in a digital portfolio, making additions throughout the unit.

Students choose one ecosystem and create a concept map that includes at least three specific habitats in that ecosystem.

Students choose any organism and draw a concept map to identify several biotic and abiotic factors in the organism’s habitat.

Students write a brief paragraph explaining how birth rate and death rate affect the size of a population.

Students choose one food and write a paragraph identifying the source of the energy that they obtain when they eat that food.

Students choose and draw a food chain, labeling each organism to show its energy role, and the level of each consumer.

Students draw and label a simple diagram of the nitrogen cycle.

Chapter Assessment:

Students can take the interactive quiz at: http://quizstar.4teachers.org/servlet/quizrepositoryservlet[Images imported online did not appear when quiz was copied & pasted below.]

Ecosystems

Quiz DirectionsUse the following words to match with their definition: Directions:    1. Answer the questions below by clicking the button next to the best answer choice or typing your

2. At the end of every page click the next button to move forward to the next page.

3. On the last page of the Quiz you will be able to see which questions are unanswered, are answered and

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(u07a1) Digital Toolscorrect answer. Each question's answers are in grey.

DO NOT HIT THE BROWSER'S BACK BUTTON!

have been flagged.

 questions:

1.1 pts.

Which of the following is not an example of a population?   

A. the pets in your neighborhood

B. the people in a city

C. the rainbow trout in a stream

D. the ants in an anthill

Flag this question for later review

 

2.1 pts.

A prairie dog, a hawk, and a badger all are member of the same   

A. habitat.

B. species.

C. community.

D. population.

Flag this question for later review

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(u07a1) Digital Tools3.1 pts.

All of the following are examples of limiting factors for populations except   

A. space

B. food

C. time

D. weather

Flag this question for later review

 

4.1 pts.

Energy enters an ecosystem from   

A. decomposers.

B. sunlight.

C. consumers.

D. producers.

Flag this question for later review

 

5.1 pts.

An omnivore is a kind of   

A. herbivore.

B. carnivore.

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(u07a1) Digital ToolsC. consumer.

D. producer.

Flag this question for later review

 

6.1 pts.

Grass is an example of a(n) abiotic factor n a habitat.   

True

False

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7.1 pts.

A rise in birth rate while the death rate remains steady will cause a population to increase in size.    True

False

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(u07a1) Digital Tools8.1 pts.

A population in an ecosystem belongs to a community consisting of different species.    True

False

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9.1 pts.

The consumers in an ecosystem produce food and stored energy.   

True

False

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10.1 pts.

A food chain shows how energy flows from organisms to organisms in an ecosystem.    True

False

Flag this question for later review

 

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11.1 pts.

Name two biotic and two abiotic factors you might find in a forest ecosystem.   

type your response above

Flag this question for later review

 

12.1 pts.

Explain how sunlight is used by plants and algae. How is this process important to other living things in an ecosystem?   

type your response above

Flag this question for later review

 

13.1 pts.

Describe how ecologists use the technique of sampling to estimate population size.   

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type your response above

Flag this question for later review

 

14.1 pts.

Give an example showing how space can be a limiting factor for a population.   

type your response above

Flag this question for later review

 

15.1 pts.

Explain why nitrogen fixation is important to organisms. How does it occur?

type your response above

Flag this question for later review

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16.1 pts.

Explain why decomposers are important in an ecosystem.   

type your response above

Flag this question for later review

 

17.1 pts.

Organisms produce carbon dioxide in the process of respiration. Explain how this carbon dioxide is recycled in an ecosystem.   

type your response above

Flag this question for later review

 

18. In a summer job working for an ecologist, you have been assigned to

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(u07a1) Digital Tools1 pts. estimate the population of grasshoppers in a field. Propose a method to get

an estimate and explain how you would carry it out.   

type your response above

Flag this question for later review

 

19.1 pts.

Explain how a food chain and a food web are similar and how they are different.   

type your response above

Flag this question for later review

 

20.1 pts.

Nitrogen-fixing bacteria grow in nodules on the roots of clover plants. Farmers sometimes plant clover instead of a crop for one growing season. Explain why this makes the soil more fertile.   

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type your response above

Flag this question for later review

 

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Center for Research on Learning at The University of Kansas

Answer Key:

Quiz Answer Key | Go back

Ecosystems Quiz Directions

Use the following words to match with their definition:

 Questions

1.1 pt(s).

Which of the following is not an example of a population?

A. the pets in your neighborhood B. the people in a city C. the rainbow trout in a stream D. the ants in an anthill

Sandra PallanteEDIM503IND_201010A

(u07a1) Digital Tools

 

2.1 pt(s).

A prairie dog, a hawk, and a badger all are member of the same

A. habitat. B. species. C. community. D. population.

 

3.1 pt(s).

All of the following are examples of limiting factors for populations except

A. space B. food C. time D. weather

 

4.1 pt(s).

Energy enters an ecosystem from

A. decomposers. B. sunlight. C. consumers. D. producers.

 

5.1 pt(s).

An omnivore is a kind of

Sandra PallanteEDIM503IND_201010A

(u07a1) Digital ToolsA. herbivore. B. carnivore. C. consumer. D. producer.

 

6.1 pt(s).

Grass is an example of a(n) abiotic factor n a habitat.

TrueFalse

 

7.1 pt(s).

A rise in birth rate while the death rate remains steady will cause a population to increase in size.

TrueFalse

 

8.1 pt(s).

A population in an ecosystem belongs to a community consisting of different species.

TrueFalse

 

9.1 pt(s).

The consumers in an ecosystem produce food and stored energy.

TrueFalse

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10.1 pt(s).

A food chain shows how energy flows from organisms to organisms in an ecosystem.

TrueFalse

 

11.1 pt(s).

Name two biotic and two abiotic factors you might find in a forest ecosystem.

biotic: trees, birds abiotic: sunlight, soil 

 

12.1 pt(s).

Explain how sunlight is used by plants and algae. How is this process important to other living things in an ecosystem?

Plants and algae use the energy of sunlight in making their own food through photosynthesis. All living things feed directly or indirectly on plants and algae.

 

 

13.1 pt(s).

Describe how ecologists use the technique of sampling to estimate population size.

Ecologists count the number of organisms in a small area, then multiply by the number of units in the entire area to estimate the total population.

 

 

Sandra PallanteEDIM503IND_201010A

(u07a1) Digital Tools14.1 pt(s).

Give an example showing how space can be a limiting factor for a population.

Limited space may make it impossible for all members of the population to find places to make nests. 

 

15.1 pt(s).

Explain why nitrogen fixation is important to organisms. How does it occur?

Nitrogen fixation is important to organisms because most organisms can use only nitrogen that is combined with other elements. Nitrogen fixation occurs as bacteria that live in nodules on the roots of some plants combine nitrogen with other elements, forming fixed nitrogen or nitrogen-containing compounds.

 

 

16.1 pt(s).

Explain why decomposers are important in an ecosystem.

Decomposers are important because they recycle organic matter in ecosystems. Decomposers return simple compounds, including nitrogen compounds, to soil.

 

 

17.1 pt(s).

Organisms produce carbon dioxide in the process of respiration. Explain how this carbon dioxide is recycled in an ecosystem.

This carbon dioxide is recycled as producers take it in during photosynthesis. 

 

18.1 pt(s).

In a summer job working for an ecologist, you have been assigned to estimate the population of grasshoppers in a field. Propose a method to get an estimate and explain how you would carry it out.

Indirect observation (counting egg clusters), sampling (counting the number in a small area, then  

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multiplying by the number of units in the entire area), or mark and recapture.

 

19.1 pt(s).

Explain how a food chain and a food web are similar and how they are different.

Both a food chain and a food web are diagrams that show the flow of energy from organisms to organisms in an ecosystem. A food web is larger and more complex than a food chain. It shows how the food chains in an ecosystem are connected.

 

 

20.1 pt(s).

Nitrogen-fixing bacteria grow in nodules on the roots of clover plants. Farmers sometimes plant clover instead of a crop for one growing season. Explain why this makes the soil more fertile.

Planting clover enriches the field by returning nitrogen-containing molecules to the soil. 

 

The QuizStar Team provides technical assistance and support to users M-F from8:00 a.m.- 5:00 p.m. Central Standard Time, excluding U.S. federal holidays.

Copyright © 2000-2005 ALTEC - Advanced Learning Technologies in Education Consortia - Terms of Use - Privacy PolicyCenter for Research on Learning at The University of Kansas

Bibliography:

Prentice Hall Science Explorer Teachers Edition Grade 6. Texas ed. Upper Saddle River: Prentice-Hall, 2002. Print.

QuizStar - Create Online Quizzes. Web. 12 Mar. 2010. <http://quizstar.4teachers.org>.