Ecosystems: Population Balance Post-Test
This post-test explores concepts related to ecosystems, population balance, and biodiversity. Questions cover topics such as energy flow in food chains, importance of biodiversity in sustainable ecosystems, ecological events in undisturbed gardens, impact of introduced species on native populations, and hunting effects on bald eagle population.
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Life Science- Ecosystems: Population Balance Post-Test
1. Which of these correctly shows the flow of energy in a food chain? A. producer sun consumer decomposer B. consumer decomposer sun producer C. sun producer consumer decomposer D. predator prey sun
2. Biodiversity is important to a sustainable ecosystem because: A. The larger variety of organisms in an ecosystem, the more niches can be filled and the more balanced the food web B. When there are more organisms there is more competition and resources are used up C. Fewer organisms put less strain on food sources in an ecosystem D. Less variety in organisms keeps a habitat from being disturbed
3. If a garden is raked and left undisturbed the events listed below will occur. In what order would these events happen? I. Seedlings will grow taller and large variety of plants will be present A. IV, III, II, I II. Worms will be found in the soil but no plants B. I, II, III, IV C. III, I, IV, II III. The plants have started flowering and bees and butterflies have started flying around the garden D. II, IV, I, III IV. Small seedlings begin to emerge and small ants and roly polies can be seen
4. With the introduction of Jacksons Chameleon to Hawaii, populations of native small birds have begun to decrease. What is the best explanation for this? A. The Chameleon is encroaching upon tree space B. Fewer birds are able to prey upon the chameleon C. Both the birds and the chameleons eat insects and there are not enough insects to sustain the populations of both predators D. The birds are migrating away
5. During the mid-1800s, hunters killed many of the species preyed upon by bald eagles. Bald eagles faced a large population decline in the twentieth century. What, if any effect did this hunting have on the bald eagle population? A. It contributed to the decline of the bald eagle population by decreasing their food source B. It increased the bald eagle population by removing competing organisms C. It caused the bald eagle population to decline because they were poisoned by the metal from the bullets D. It did not affect the bald eagle population
