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Test your knowledge of food chains, population size estimation, and competition in this Jeopardy-style game. Answer questions and earn points as you learn about organisms, energy transfer, sampling methods, and more!
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Jeopardy Population size Population Growth Water Quality Competition Food Chains Q $100 Q $100 Q $100 Q $100 Q $100 Q $200 Q $200 Q $200 Q $200 Q $200 Q $300 Q $300 Q $300 Q $300 Q $300 Q $400 Q $400 Q $400 Q $400 Q $400 Q $500 Q $500 Q $500 Q $500 Q $500
$100 Question: Food Chains • Organisms, such as plants, that make their own food are called________? Organisms, such as animals, that cannot make their own food are called _________? • a. autotrophs, heterotrophs. • b. heterotrophs, autotrophs. • c. producers, decomposers. • d. decomposers, consumers.
$100 Answer: Food Chains a. Autotrophs, heterotrophs.
$200 Question: Food Chains Rank the following in order from largest to smallest: Organism; ecosystem; community; biome; biosphere; population.
$200 Answer: Food Chains Organism, population, community, ecosystem, biome, biosphere.
$300 Question: Food Chains Put the following into a food chain: Deer, wildflower, fungus, vulture. Which of these are producers? Consumers? Decomposers?
$300 Answer: Food Chains Wildflower --> deer --> vulture Fungus Producer: wildflower Consumer: deer, vulture Decomposer: fungus
$400 Question: Food Chains Producers in one food chain obtain 300 energy units from photosynthesis. How many energy units will be transferred to the tertiary (3rd) consumers?
$400 Answer: Food Chains 300 x .1 x.1 = 3
$500 Question: Food Chains Scientists discover fossils of a large tortoise that lived on a small island group in the Pacific. The tortoise was likely the biggest animal on the island. Based on your knowledge of energy transfer in ecosystems, predict whether the tortoise was an herbivore, carnivore or omnivore. EXPLAIN your reasoning.
$500 Answer: Food Chains The tortoise was probably an herbivore, since it would need to eat relatively low on the food chain to obtain the energy it needed to sustain its large body size (think elephants, moose and other large herbivores). Also, all tortoises are herbivores :).
$100 Question: Population Size What is sampling?
$100 Answer: Population Size Sampling is estimating a population’s size by counting a number of organisms in a given area, then using that number to estimate the total number of organisms.
$200 Question: Population Size You need to estimate the number of oak trees in Rock Creek Park. Which of the following methods would NOT work? Sampling Census Mark and release.
$200 Answer: Population Size C. Mark and release.
$300 Question: Population Size A scientist wants to estimate the number of white perch in the Potomac River. He catches 50 perch and marks them, and then releases them into the river. Later, he catches 100 fish, 2 of which have a tag. What is the approximate number of white perch in the river?
$300 Answer: Population Size 50 x 100 = 2,500 white perch 2.
$400 Question: Population Size What are two drawbacks to using a census to count population size? What are two drawbacks to using mark and release method to count population size?
$400 Answer: Population Size A.It is difficult to ensure that you count every organism in a given area; depending on birth and death rates, organisms may be born/die during the census. B. Marks may fall off organisms; those initially tagged and recaptured may be more likely to be caught than others.
$500 Question: Population Size You are tasked with counting the number of people in the D.C. metropolitan area. Describe TWO methods you could use to do this and the benefits and drawbacks of each.
$500 Answer: Population Size Census and sampling. The census could be difficult because of frequent immigration to and emigration from the region. In addition, there may be certain populations (those without fixed addresses, illegal immigrants) who cannot be counted easily. The benefit is that you would theoretically count everyone. Sampling could be difficult because of variable population densities and the same reasons as above. The benefit is that it would take less time and be less expensive than taking a census.
$100 Question: Competition Considering the advances in fishing technology, which of these is the best reason for a country to limit fishing to only a short season during the year? A. to leave enough fish to replenish the fish population B. to better regulate the tourist industry C. to keep fishermen from using new technology D. to discourage the use of fish as a source of protein
$100 Answer: Competition A. to leave enough fish to replenish the fish population
$200 Question: Competition Which of the following can result from overexploitation of fisheries? Crashing the fish population. Disrupting the food chain, so that the population of whatever the fish eatsincreases. Economic collapse in countries dependenton fishing. All of the above.
$200 Answer: Competition D. All of the above.
$300 Question: Competition Describe what is meant by “the Tragedy of the Commons.”
$300 Answer: Competition The Tragedy of the Commons results from misuse of publicly available resources, Particularly when those resources are over- Exploited and diminished for all users.
$400 Question: Competition In the graph below, humans are predators and fish species are prey. What can we conclude about the influence of the predator population on the prey population? About the influence of the prey population on predator population?
$400 Answer: Competition • The prey population decreases as the predator population increases and vice versa. The more humans there are, the • fewer fish there are; the more fish, • the fewer humans.
$500 Question: Competition Overfishing is a major international problem. What are some strategies that conservationists could use to encourage countries with fishing-based economies not to over fish? What are some consequences that could be enforced on countries that cotinue to over fish?
$500 Answer: Competition Countries that rely on the fishing industry could be encouraged to switch to sustainable fishing practices or have hatcheries funded by international organizations and NGOs. Some consequences could include trade sanctions, tariffs, and other internationally enforced economic policies. Answers will vary.
$100 Question: Water Quality What is the benthic zone?
$100 Answer: Water Quality The zone at the bottom of the river or ocean.
$200 Question: Water Quality A healthy water system would have which of the following: A variety of macroinvertebrates and a high level of dissolved oxygen. A variety of macroinvertebrates and high levels of nitrates. A variety of macroinvertebrates and low light levels. A variety of macroinvertebrates and an acidic pH.
$200 Answer: Water Quality A variety of macroinvertebrates and a high level of dissolved oxygen.
$300 Question: Water Quality What is a source of dissolved oxygen in water? Photosynthesis Respiration Transpiration Turbulence Both A and D.
$300 Answer: Water Quality D. Both turbulence and Photosynthesis.
$400 Question: Water Quality High nutrient levels in water can lead to high levels of algae growing. What are some of the negative consequences of such an algae bloom.
$400 Answer: Water Quality Algae produces dissolved oxygen, but when it dies decomposers consume more dissolved oxygen than the algae produced, leading to “dead zones” in rivers or the Bay. Algae, dead or alive, can also block light to under- water vegetation, thereby lowering oxygen produced by photosynthesis.
$500 Question: Water Quality You need to establish whether a river system is healthy. Describe what tests you could do to ascertain its health and what results you would expect from these tests were the river system healthy.
$500 Answer: Water Quality Test for: Dissolved oxygen, pH, temperature, nutrient levels (nitrates and phosphates), light levels, health of fish, variety of macroinvertebrates. Healthy tests: high DO, neutral pH, lower temp. than surrounding land, low nutrient levels, high light levels, fish without tumors/stress reactions, and a variety of macroinvertebrates.
$100 Question: Population Growth What is carrying capacity?
$100 Answer: Population Growth The number of organisms of one species that an environment can support indefinitely.
$200 Question: Population Growth In which type of growth does carrying carrying capacity play a role? What are some factors that cause population growth to stay around carrying capacity?
$200 Answer: Population Growth Logistic growth. Factors include limited Biotic and abiotic resources such as prey, competition, space, water, etc.
$300 Question: Population Growth Which line represents a J-curve? Which shows exponential growth?
$300 Answer: Population Growth The “inanity of statements” line is a J-curve and therefore shows exponential growth. The “intelligence” line shows exponential decay.
$400 Question: Population Growth A single bacterium undergoes binary fission (cell division in bacteria), producing 2 bacteria. Each of these then undergoes binary fission. Their offspring undergo binary fission. How many bacteria will result from the last round of binary fission?GRAPH your answer.
$500 Question: Population Growth An emperor promises his people one grain of rice on March 1st, two on March 2nd, four on March 3rd, etc. How many grains of rice will his people receive on March 15th? GRAPH what this would look like!
