food webs quiz Name: Date: 1. The picture below shows an energy pyramid. 3. Which model correctly shows energy flow in a food chain? A. B. What will most likely happen to the foxes and the wolves if the rabbits are removed? C. D. A. The foxes will eat more wolves. B. The foxes will eat fewer wolves. C. There will be more foxes and wolves. D. There will be fewer foxes and wolves. 2. The picture below shows an ocean bay food chain. Sea otters move into the ocean bay. They eat all the sea urchins. This change will cause the A. kelp to have less food. B. crabs to have more food. C. sea ducks to have less food. D. arctic foxes to have more food. page 1 4. A marine food web is shown in the diagram below. 5. A marine food web is shown below. Which organism below belongs in level 3 of this marine food web? A. salmon B. zooplankton Which chart correctly shows three of the organisms C. sea alga D. polar bear according to their roles in cycling matter in the marine food web? A. B. C. D. page 2 food webs quiz 6. The picture below shows the energy flow through 8. Which statement best describes the flow of energy a meadow community. as it passes through the organisms in the pyramid? A. Energy flows through the organisms from bottom to top and increases at each level. B. Energy flows through the organisms from bottom to top and decreases at each level. C. Energy flows through the organisms from top to bottom and increases at each level. Which of the following would most likely occur D. Energy flows through the organisms from top to the populations within the community of to bottom and decreases at each level. organisms immediately after a wildfire burns the environment? A. Hawks would increase and foxes would increase. B. Hawks would decrease and foxes would increase. C. Meadow plants would increase and rabbits would decrease. D. Meadow plants would decrease and rabbits 9. The diagram below shows a simple food web. would decrease. 7. Which statement best describes what will happen if the population of herbivores in the community decreases? A. The population of foxes will increase. Which animal is classified as an omnivore? B. The population of hawks will increase. A. red fox B. deer C. The population of rabbits will increase. C. black bear D. rabbit D. The population of meadow plants will increase. page 3 food webs quiz 10. The diagram below shows a simple food web. 11. Decomposers are important in the food chain because they A. produce their own food using light from the Sun. B. stop the flow of energy from one organism to Which of the following animals might compete another. with the coyote in this food chain? C. break down dead organisms and recycle nutrients into the soil. A. D. are microscopic and other organisms cannot consume them. B. C. 12. The diagram below shows a marine food chain. Phytoplankton ! Zooplankton ! Herring ! Salmon The zooplankton in this food chain are D. A. primary producers. B. primary consumers. C. secondary consumers. D. tertiary consumers. page 4 food webs quiz 13. The table below contains information about animal 14. A forest-ecosystem food web is shown below. diets. Which energy pyramid best represents the data in the table? A. If additional wrens are introduced into this ecosystem, there will most likely be an immediate decrease in the A. frog population. B. snake population. C. falcon population. B. D. grasshopper population. C. 15. In a pond, the primary producer is a green alga, Spirogyra; the primary consumer is the crustacean, Daphnia; the secondary consumer is a small fish, the bluegill; and the tertiary consumer is a larger fish, the smallmouth bass. What changes can be expected in the pond if the Daphnia are killed with pesticides? A. The Spirogyra population will probably die. D. B. The bluegill population will probably increase. C. The Daphnia population will eat something else. D. The smallmouth bass population will die. page 5 food webs quiz 16. A food chain is shown below. 19. Examining Simple Communities A group of organisms that interact with and Grasses ! Crickets ! Field Mice ! Hawks depend upon one another is called a community. The movement of matter and energy through a For the food chain shown, which of the following community can be studied by examining its food changes would have the most severe consequences? web. As organisms eat other organisms, energy and nutrients pass through various feeding levels. These feeding levels are called trophic levels. The A. a drastic decrease in rainfall, causing drought following is a diagram of the energy and nutrient B. the poaching of predatory hawks by game flow through a simple community. hunters C. the introduction of a second predator that eats field mice D. a parasitic infestation that reduces the cricket population Which group would most likely contain living algae? most 17. Which of these organisms would likely be A. Producers found at the top of an energy pyramid? B. First order consumers A. clams B. sardines C. Second order consumers C. sharks D. kelp D. Decomposers 20. According to the diagram, nutrients from dead organisms are released into the soil by the action 18. Which of these organisms would most likely be of . found at the bottom of a biomass pyramid? A. producers A. giant squids B. sand sharks B. first order consumers C. sea cucumbers D. green algae C. third order consumers D. decomposers page 6 food webs quiz 21. 23. Ecosystems are composed of all living and nonliving components in an area. Food webs show the flow of nutrients and energy within an ecosystem. Use the food web to answer the following questions. A group of students on a field trip observed the following organisms on an old oak tree: Woodpecker Honey Bee Oak SquirrelBeetle Caterpillar 1. Which of the following food chains is most likely to be found in this ecosystem? A. Caterpillar ! honey bee ! woodpecker B. Oak tree ! squirrel ! woodpecker Suppose that a new predator of the rabbit migrated C. Oak tree ! caterpillar ! woodpecker to this ecosystem. What is the most likely initial effect on the other organisms? D. Beetle ! woodpecker ! squirrel A. More competition among the mice for food B. More competition among the hawks for food 22. The diagram shows part of an aquatic food web C. Less competition among snakes for food for a stable lake ecosystem in Connecticut. D. Less grass available for food 24. A chemical pesticide was applied to an area of this ecosystem by a landowner to control the mouse population. There was a decrease in the mouse population due to the presence of this pesticide. Which one of the following would most likely occur first due to this change in the ecosystem? What is the source of energy for the algae? A. The amount of grass would decrease. A. waves B. The snake population would increase. B. sunlight C. The rabbit food supply would increase. C. bacteria D. The snake food supply would increase. D. rotifers, water fleas and tadpoles page 7 food webs quiz 25. The available chemical energy in this ecosystem 28. Interactions in an ecosystem result from the . transfer of matter and energy from producers to consumers and eventually to decomposers. A. decreases as it flows from consumer to What are the forms of energy transfer from producer #1 ! #4? B. remains constant as it flows from consumer to producer C. decreases as it flows from producer to consumer D. increases as it flows from producer to consumer A. Chemical energy to chemical energy 26. Which one of the following is true of grass in an B. Light energy to chemical energy ecosystem? C. Chemical energy to heat energy A. It converts oxygen to glucose. D. Heat energy to mechanical energy B. It produces carbon dioxide from oxygen and water. C. It produces glucose from carbon dioxide and water. D. It converts water to energy. 27. If animals eat plants to get energy, where do plants get their energy? A. Soil B. Water C. Wind D. Sun page 8 food webs quiz 29. A simple food chain is shown. 30. How would the removal of earthworms from the food chain affect the other organisms? What is the source of food in this food chain? A. The number of bass will increase. B. The number of crayfish will decrease. C. The crayfish will get their energy directly A. Sun B. Frog from the Sun. C. Grass D. Grasshopper D. The number of bass and ospreys will increase. page 9 food webs quiz 31. A student examines the information in the table. 33. In ecosystems, the sun's energy is transferred The student concludes that Organism W should through food webs as shown below. be placed at the base of the food web, to represent the feeding relationships in the marine ecosystem. However, the student later learns that Organism W's cells do not contain chloroplasts. Organism Behavior Movement T Feeds on Organism U Mobile U Feeds on Organisms V and W Mobile V Is eaten by Organism U Mobile W Is eaten by Organisms U and V Stationary Which conclusion would be appropriate, based on The sun's energy is most directly available to the new information? people through A. Another organism in the marine ecosystem is A. path A. B. path B. a producer. C. path C. D. path D. B. Organism W is a secondary consumer in the marine ecosystem.