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Transcript
Science 7: Unit A - Unit Exam - WRITE YOUR NAME ON THE ANSWER SHEET!!! Move your desks apart. DO NOT write in booklet. Read each question carefully before answering. Read each option before answering. Take your time. You have the entire block to write this exam. - If you get stuck on a question, mark it on your answer sheet and move on. You can come back to it later. - Good luck!!! 1. Which of the following describes an ecological footprint? a) b) c) d) The trace fossil left behind by a large animal The amount of resources we need to live our lifestyle The tracks left behind by a population of animals The population habits in British Columbian ecosystems 2. Which of the following is a population? a) b) c) d) A wetland ecosystem An ant colony An ant colony and group of aphids A lawn full of grass and weeds 3. Which of the following ways would allow you to reduce your ecological footprint? a) b) c) d) drive more often throw out your own garbage eat more dairy products recycle more 4. Why did the use of DDT eventually become banned? a) b) c) d) a more toxic pesticide was created it was becoming concentrated in the food chain It created soft eggshells in Peregrine falcon eggs All of the above 5. The gradual increase of a chemical in the tissues of organisms as you go up the food chain is known as: a) b) c) d) Bioaccumulation ecological footprint concentration succession 6. The beluga whale species is in serious danger of being wiped out completely. The beluga whale’s present day condition is known as: a) b) c) d) extinct endangered threatened at risk 7. If the beluga whale species does eventually become wiped out, the species would be known as: a) b) c) d) extinct endangered threatened at risk 8. Why were the numbers of Peregrine falcons shrinking so fast? a) b) c) d) Predation Concentration of toxic chemicals in its food chain Pesticides softened its eggshells Captive breeding wiped out its adults 9. One method used to help recover its numbers was: a) b) c) d) Predation Succession Competition Captive Breeding 10. Which of the following is not a basic need? a) b) c) d) Water Bottled water Clean air Shelter 11. What is the ecological footprint for the average Canadian? a) b) c) d) 1.7 ha 2.2 ha 4.3 ha 75 ha 12. Pet rabbits released into the parks and lawns of Victoria and exploding in population is an example of an introduced species. a) True b) False 13. The following diagram is a food chain. a) True b) False 14. The mushrooms in the above diagram are acting as: a) b) c) d) producers secondary consumers decomposers scavengers 15. What’s missing from the above diagram? a) b) c) d) Producers Consumers Decomposers Scavengers 16. The mouse, rabbit, and grasshopper are all: a) b) c) d) producers omnivores herbivores scavengers 17. The owl, frog, snake are all examples of: a) b) c) d) producers herbivores carnivores omnivores 18. The one animal in the diagram that is both predator and prey is: a) b) c) d) the mushroom the snake the frog the grasshopper 19. Which of the following is an example of an abiotic factor? a. b. c. d. earthworms in soil water in a pond grass in a field a bird in the sky 20. Which of the following is an example of mutualism? a. b. c. d. a baby kangaroo is carried by the mother kangaroo in her pouch a mosquito sucking blood from your arm a bee pollinating a flower a Venus fly trap capturing a fly 21. Which of the following "ecosystems in a jar" would be most successful? a. b. c. d. water, sand, algae, and soil placed in a closet water, sand, algae, and snails placed in a window water, sand, algae, and sea weed placed in a window water, sand, algae, and snails placed in a closet 22. What item in the following list would have the greatest negative impact on our environment if a student threw it onto the schoolyard? a. b. c. d. paper cup Styrofoam cup chocolate bar sandwich 23. A report written to evaluate the health of an ecosystem is known as a(n): a. b. c. d. Environmental impact assessment Ecological impact assessment Ecosystem impact assessment Ecosystem impact report 24. The most effective of the three ‘r’s’ to practice is: a) b) c) d) Recycling Reducing Reproducing Reusing 25. Becoming a vegan or vegetarian is a good way of decreasing your ecological footprint. a) True b) False Use the following information to answer the next three questions. Stasy sets up her own mini-ecosystem. She places sand, water, duckweed (a plant), seahorses, a snail, and zucchini slices into a glass jar. She then closes the lid and leaves it closed for the whole three weeks she’s studying it, without opening it once. 26. Which of the following is an abiotic factor of the ecosystem? a) b) c) d) duckweed seahorses water snail 27. Stasy’s ecosystem can be best described as: a) b) c) d) natural open closed a super-organism 28. Vultures are animals which prefer to eat already killed animals rather than hunt down living ones. Which term below best describes vultures? a) b) c) d) Decomposers Scavengers Consumers Producers 29. A pyramid of numbers is wide at the base and narrow at the top, because a. b. c. d. there are more carnivores than herbivores. there is more energy available to the carnivores. there are more herbivores than carnivores. there is less energy available to the producers. 30. Fleas and your pet dog Fluffy are an example of what? a) b) c) d) Mutualistic relationship Commensalistic relationship Parasitic relationship Fun times for your dog 31. Mutualism, commensalisms, and parasitism are all different kinds of: a) b) c) d) animal relationships plant relationships symbiotic relationships all of the above 32. When animals try to fight for food, space, and water, they are: a) b) c) d) in competition in predation scavenging decomposing 33. The two main goals of any living thing is to: a) b) c) d) hunt and kill eat and drink live and die survive and reproduce 34. Tommy bought a patch of land from a developer. The land is a bare patch of dirt. It used to be a field, but the grass was destroyed in a wild fire. What kind of succession will take place on Tommy’s land? a) b) c) d) primary secondary tertiary bioinvasion 35. It’s been thirty years since the last question and Tommy, now a millionaire, discovers an island while sailing on his yacht. What living thing should Tommy introduce to the island if he wants it to undergo primary succession? a) algae b) fungus c) lichen d) moss 36. It’s been 5000 years since the above question. Tommy’s Island is now a beautiful paradise full of large, old trees, animals, and all sorts of living things. What’s happened to Tommy’s Island? a) b) c) d) It’s continuing to undergo succession The animals are replacing the plants on the island A climax community has formed Secondary succession is occurring. 37. To help deal with the large numbers of dung beetles he is studying, Pedro decides to rope off a section of the meadow ecosystem he’s in and count the beetles in that area. What has Pedro just done? a) b) c) d) Create an environmental impact assessment Create a temporary plot Create a quadrat All of the above 38. What is special about the ecosystems that exist on the ocean floor? a) The ecosystem exists without the sun’s energy b) The ecosystem exists at high pressures c) The ecosystems contain some of the oldest species of animals and plants on Earth d) We do not know yet where they get their energy from 39. Which class of organism do all other classes depend on? a) Producers b) Primary Consumers c) Secondary Consumers d) Scavengers 40. The four processes involved in the water cycle are: a) evaporation, condensation, and precipitation, and transpiration b) photosynthesis, respiration, and liquification, and transpiration c) liquification, melting, freezing, and condensation d) precipitation, condensation, steamification, and gentrification 41. Where does the matter that makes up all living things come from? a) From the Earth b) From non-living materials c) From abiotic factors d) All of the above 42. Relationships in an ecosystem are best described as: a) co-dependent b) interdependent c) independent d) hostile 43. Which of the following IS a basic need of humans? a) transportation b) carbon dioxide c) nitrogen d) oxygen 44. For a population to survive and grow in an ecosystem, it must: a) Establish a parasitic relationship with a larger host species b) Avoid contact with humans and other large omnivores c) Become adaptive to changes that happen in the ecosystem d) all of the above 45. True or false: Energy flows only in one direction in food chains. a) True b) False 46. How is carbon cycled in an ecosystem? a) Through plants and from carbon dioxide to carbon monoxide and back again b) Through animals and from carbon dioxide to water and back again c) Through plants changing carbon dioxide to sugar and animals and plants back to carbon dioxide again d) Through plants and animals making sugar from carbon dioxide and plants changing the sugar back to carbon dioxide 47. Energy is continuously being recycled by ecosystems. a) True b) False 48. Biomass represents… a) b) c) d) The total mass of a population of animals in an ecosystem The total mass of a community of organisms in an ecosystem The total mass of one whole niche of organisms in an ecosystem It represents all of these things 49. Acid rain is produced when… a) b) c) d) Carbon dioxide is released into the air Nitrogen and sulfur compounds are released into the air The metal mercury is released into the air DDT and PCB chemicals are released into the air 50. The main reason DDT is still in use today is because… a) It is an effective fertilizer that helps crops grow b) It protects humans and crops from disease carrying pests c) It is still an effective medicine against such diseases as malaria and typhoid d) All of the above BONUS: The two major reasons we talked about why the carbon cycle is now out of balancer were: a) b) c) d) Spraying plants with chemical pesticides and PCBs Spraying plants with chemical pesticides and bioaccumulation Producing air pollution and introducing foreign animals Producing air pollution and clear-cutting of trees