Chapter 2 Test - eLibrary

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Complete this test to demonstrate your knowledge and understanding of cycles in ecosystems.

:KDWWR'R Carefully read the instructions below before answering each set of questions. 7UXH)DOVH4XHVWLRQV In the space provided, indicate if the statement given is true (T) or false (F). If you think that the statement is false, correct the statement in the space provided. 1. In a food chain, food energy passes from consumers to producers.

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____________________________________________________________________________ 2. During cellular respiration, producers use the trapped energy in chlorophyll to convert carbon dioxide and water into food and oxygen.

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____________________________________________________________________________ 3. A food web shows a network of interconnected food chains.

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____________________________________________________________________________ 4. There are three main processes in the water cycle: evaporation, transpiration, and precipitation.

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____________________________________________________________________________ 5. Bioaccumulation is the build up of pollutants in organisms.

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____________________________________________________________________________ 6. Succession is a rapid change in which old species are removed and new species grow.

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____________________________________________________________________________ 7. Birds and mammals are usually present only in the later stages of succession.

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Copyright © 2005, McGraw-Hill Ryerson Limited, a Subsidiary of the McGraw-Hill Companies. All rights reserved. This page may be reproduced for classroom use by the purchaser of this book without the written permission of the publisher.

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ASSESSMENT 

6KRUW$QVZHU4XHVWLRQV Answer the questions below in full sentences. 8. What is the importance of chlorophyll to life on Earth? Explain your answer. ____________________________________________________________________________ ____________________________________________________________________________ 9. Write a food chain below that has three steps and ends with a human.

10. What is the difference between a food chain and a pyramid of numbers? ____________________________________________________________________________ ____________________________________________________________________________ 11. In the water cycle, what is the difference between run-off and ground water? ____________________________________________________________________________ ____________________________________________________________________________ 0DWFKLQJ,WHPV Beside each statement on the left-hand side, place the letter representing the limiting factor on the right-hand side that best matches the statement. Statements ____ 12. There are only ten trees in which a species of bird can nest.

Limiting Factors (a) weather patterns (b) predator/prey cycles

____ 13. The forest where the deer live burns when the summers are very dry. ____ 14. A new type of virus appears in the ecosystem and it affects large mammals. ____ 15. The caribou herd is very small because of disease, so the wolves do not have enough to eat.

(c) competition for resources (d) forest fire (e) disease

Copyright © 2005, McGraw-Hill Ryerson Limited, a Subsidiary of the McGraw-Hill Companies. All rights reserved. This page may be reproduced for classroom use by the purchaser of this book without the written permission of the publisher.