SNC1D - Sustainable Ecosystems Unit Review
Study tips:
ü Start preparing one week ahead
ü Create your perfect study area. The place where you study should be quiet, comfortable and free from distractions (turn off your phone)
ü Turn your notes into flashcards
ü Have a healthy snack while you stuyd
ü Take breaks
ü Have someone test your knowledge
ü Get enough sleep
□1. Define the following: organism, population, community, ecosystem, biome, biosphere.
□2. What are the sphere's of the earth and which does what?
□3. Define sustainable. Provide an example.
□4. Explain the difference between biotic and abiotic factors. Give examples of each.
□5. Given a picture showing a nature scene, identify biotic and abiotic factors.
□6. Given a list of factors (e.g., grass, trees, water, oxygen, deer, worms, soil, bacteria, rotting logs), identify
which ones are biotic and abiotic.
□7. Explain the difference between producers and consumers, autotrophs and heterotrophs.
□8. Explain each of the following terms, giving examples for each: omnivores, herbivores, carnivores,
scavengers, parasites, decomposers.
□9. What is a food chain?
□10. What is a food web?
□11. How does a food chain differ from a food web?
□12. Given a list of organisms, construct a food chain or food web.
□13. What is a trophic level?
□14. For a given food chain/web, identify the different tropic levels.
□15. For a given food chain/web, identify an example of a (a) producer, (b) consumer, (c) primaryconsumer,
(d) secondary consumer,(e) top carnivore, (f) herbivore, (g) omnivore, (h) scavenger, (k) decomposer.
□16. What direction do arrows point on a food web? Why?
□17. Define niche or use it properly in a sentence.
□18. In terms of biotic and abiotic factors, what is the important role of producers?
□19. In terms of biotic and abiotic factors, what is the important role of decomposers and scavengers?
□20. Given numerical data, construct a pyramid of numbers, a pyramid of biomass, and a pyramid of energy.
□21. What does the area of each type of pyramid represent?
□22. How much energy is passed along a food chain with each level of consumer?
□23. How much energy is lost between each level of a food chain? Where does this energy go?
□24. In terms of energy flow in an ecosystem, explain why we rarely see more than 4 or 5 tropic levels.
□25. What is a pest? What is a pesticide?
□26. For each of the following examples, identify the type of species interaction: mutualism, commensalism,
parasitism
□27. What factors limit the growth of a population?
□28. What do we call the condition where the population does not grow any further?
□29. Give some examples of factors which influence population that are density-dependent.
□30. Give some examples of factors that influence population which are density-independent.
□31. In Priestly's experiments, why did the plant and the mouse live longer when they were put under the jar
together?
□32. What is photosynthesis?
□33. Why can we call photosynthesis and cellular respiration, 'complimentary processes?'
□34. Discuss how humans are impacting the sustainability of ecosystems.
□35. Provide an example of habitat-loss
□36. Why is it better to have one larger protected area versus a bunch of smaller ones.
□37. Define overexploitation and provide an example.
□38. Define or explain the terms bioaccumulation and bioamplification
□39. Give an example of a substance that has been introduced into the environment that illustrates the impact of
bioaccumulation. What effect does this substance have?
□40. Why do some substances bioaccumulate while others do not?
□41. Explain the impact of fertilizers on aquatic ecosystems using the term eutrophication.
□42. What is an invasive species vs. an exotic species?
□43. Provide an example of an invasive species
□44. How did invasive species get here?
□45. List ways in which humans can take part in making the Earth more sustainable.