Presentation on theme: "CHAPTER 5 HOW ECOSYSTEMS WORK"— Presentation transcript:
1CHAPTER 5 HOW ECOSYSTEMS WORK REVIEWCHAPTER 5HOW ECOSYSTEMS WORK
2A. Atlantic Ocean B. Limestone C. Amazon rain forest D. Fossil fuels Which of the following is one of the largest carbon reservoirs on Earth?A. Atlantic OceanB. LimestoneC. Amazon rain forestD. Fossil fuels
4Where would an ecologist be least likely to go to study primary succession? A. A locked, abandoned asphalt parking lot in New York CityB. The Amazon Rain ForestC. A new island formed by a volcanic eruptionD. A gravel-filled valley that had been covered by a glacier until recently
8Plants play a crucial role in the carbon cycle because they A. Allow carbon to enter an ecosystem through photosynthesisB. Have special bacteria that live in their root systemsC. Do not release carbon dioxide during cellular respirationD. Are chemically converted into fossil fuels when burned.
9A. Allow carbon to enter an ecosystem through photosynthesis
10A. Energy transfer B. Energy pyramid C. Food chain D. Food web What term is used to refer to the many feeding relationships that are possible in an ecosystem?A. Energy transferB. Energy pyramidC. Food chainD. Food web
12Which of the following statements is NOT correct A. Rare bacteria that live deep in the ocean get their energy from hydrogen sulfide in hot waterB. Plants and other producers get their energy directly from the sunC. Animals get their energy from the sun indirectlyD. Consumers get their energy directly from the sun.
13D. Consumers get their energy directly from the sun.
14Which of the following is NOT a true statement about cellular respiration? A. It is essentially photosynthesis in reverseB. Sugar molecules are its primary productsC. Oxygen is one of the primary reactantsD. It produces energy for organisms to use
18Succession is possible because A. Climate change over timeB. It is a rapid and chaotic process that is very difficult to controlC. Existing plants reproduce quicklyD. New species make the environment less suitable for previous ones
19D. New species make the environment less suitable for previous ones
20Which of the following is NOT a likely component of soil formed during primary succession? A. Broken bits of stone and rockB. Decayed lichens and bacteriaC. Cast-off parts of shrubs and treesD. Dust particles from the air
22Which item is a carbon sink and NOT part of the carbon cycle? A. Consumers breaking down carbohydrates into carbon dioxide during respirationB. Carbon dioxide being converted into carbohydrates during photosynthesisC. Carbon in the atmosphere in the form of carbon dioxideD. Carbon found within limestone rocks
26Which statement describes how humans are affecting the balance of carbon in the atmosphere? A. Fewer agricultural crops are planted, reducing the amount of CO2 released into the atmosphereB. Burning fossil fuels in great quantities has increased the amount of CO2 in the atmosphereC. Overgrazing of grasslands has reduced the amount of CO2 in the atmosphereD. Severe drought in large areas of the world has decreased the amount of CO2 that is released into the atmosphere
27B. Burning fossil fuels in great. quantities has. increased B. Burning fossil fuels in great quantities has increased the amount of CO2 in the atmosphere
28What type of succession occurs after a natural process such as a volcanic eruption or flood? A. Old-field successionB. Climax communityC. Primary successionD. Secondary succession
30The bacteria that live within the roots of a soybean plant are a critical part of the nitrogen cycle because theyA. Provide the plant with sugars needed for growthB. Transform nitrates into nitrogen gas for releaseC. Change atmospheric nitrogen into a usable formD. Release nitrogen by decomposing dead plant parts
31C. Change atmospheric nitrogen into a usable form
32Which of the following is an example of secondary succession? A. Pioneer plants begin to grow after glacial meltingB. Appearance of weeds in cracks in a concrete surfaceC. Breaking down of bare rock by fungi and mossesD. Growth of plants after a forest is destroyed by fire.
33D. Growth of plants after a forest is destroyed by fire.
34Which kind of organism obtains energy only from producers? A. OmnivoresB. DecomposersC. HerbivoresD. All of the above
36What kind of natural disaster helps some forest communities by allowing some trees to release their seeds, by clearing away deadwood, and by encouraging new growth?A. FireB. FloodC. WindstormD. Drought
38The energy consumed by organisms A. Is not partially lost during digestionB. Can be stored in fat and sugar moleculesC. Remains constant at all trophic levelsD. undergoes magnification in food chains
46Which of the following is responsible for making nitrogen in the atmosphere usable by living organisms?A. Nitrogen-fixing bacteriaB. Absorption of nitrogen into water systemsC. Decomposing bacteriaD. Conversion of nitrogen into carbohydrates by photosynthesis