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ECOLOGY Grade 7 Science POWERPOINT SLIDESHOW INTERACTIONS & ECOSYSTEMS UNIT TEST You will have 45 seconds for each multiple choice question and extra time for the additional questions following the multiple choice questions at the end of the test. All of your answers should be recorded on the Unit Test Response Sheet you have been given. Supporting Science Textbook Content while enriching the Learning Process in Junior High/Middle School ECOLOGY Concept Map This slide is intended to provide an overview of the concepts that were covered in this unit The questions this test is designed to Evaluate cover the key concepts. ECOLOGY 1. An ecosystem thrives with biotic & abiotic parts. An example of a biotic part of an ecosystem is ... A. wind B. water C. minerals D. fern plants 2. Which of the following should be classified as a community ? A. A flock of birds B. A pack of wolves C. A wetland marsh D. A school of dolphins ECOLOGY 3. Living things have basic needs. Throughout the first section in this unit the needs of living things were examined in depth. The four basic needs of living things are: A. food, water, habitat, space B. food, clothing, oxygen, love C. oxygen, water, food, habitat D. water, oxygen, habitat, protection 4. A particular relationship where one organism benefits (like a tree orchid – which receives access to sunlight) and the other organism (the tree) is not harmed or helped is called ... A. commensalism B. predator-prey C. mutualism D. parasitism ECOLOGY 5. The relationship where both organisms help each other - such as the goby fish and the snapping shrimp is called ... A. parasitism B. mutualism C. predator-prey D. commensalism 6. Because some of the lamprey’s victims die after it has attached itself to its host, the relationship that exists is considered to be … A. parasitism B. mutualism C. predator-prey D. commensalism ECOLOGY 7. The beaver population in Yoho National Park has declined due to ... A. lower water flow B. fewer forest fires C. more Aspen trees D. more hunting permits 8. A clay liner and a system of pipes is used in a sanitary landfill to … A. recycle waste B. restore oxygen C. prevent leakage D. prevent disease ECOLOGY 9. What happens to ‘waste’ energy in an ecosystem? A. It is given off into the atmosphere B. It is used as recycled energy C. It is absorbed by animals D. It is absorbed by plants 10. Organisms in an ecosystem can be classified as producers or consumers. The producers provide food for the consumers. An organism that consumes both producers and other consumers is called a ... A. B. C. D. prey herbivore carnivore omnivore ECOLOGY 11. Which of the following word equations describes cellular respiration? A. B. C. D. Food + oxygen carbon dioxide + water + energy Food + carbon dioxide + energy water + oxygen Light energy + oxygen + carbon dioxide water + food Light energy + carbon dioxide + water food + oxygen 12. Decomposers – known as the clean-up crew - are the decomposers. Scavengers also get rid of the waste in an ecosystem. Scavengers differ from decomposers because they ... A. B. C. D. do not eat dead organisms break down larger organisms do not kill organisms for food only feed on living plants and animals ECOLOGY 13. Rank the following ecosystem members: Carnivores – Herbivores – Producers, in term of their numbers. Highest to lowest A. B. C. D. Herbivores - Producers - Carnivores Producers - Herbivores - Carnivores Producers - Carnivores - Herbivores Herbivores - Carnivores – Producers 14. When changes in these occur in an ecosystem food web, which of the following would affect the members of that food web? A. B. C. D. Neither biotic nor abiotic factors Both abiotic and biotic factors Abiotic factors only Biotic factors only ECOLOGY 15. Food chains and food webs are models in science, which visually show us the different relationships within an ecosystem. The primary difference between the food chain and the food web is ... A. B. C. D. a food web shows how energy is used a food chain shows how energy is stored a food web is a complex system of food chains a food chain is a combination of different food webs 16. All living things need water to live. The water cycle has four main processes. The two processes that return water to the earth are ... A. evaporation and transpiration B. evaporation and condensation C. condensation and precipitation D. transpiration and condensation ECOLOGY 17. The process in which water, goes through a change of state, from a liquid to a gas, is called ... A. evaporation B. transpiration C. condensation D. precipitation 18. Salt is removed from salt water in the process called desalination. Which cycle on the Earth does desalination represent? A. The water cycle B. The carbon cycle C. The nitrogen cycle D. The hydrogen cycle ECOLOGY 19. Natural disasters or human activity can change an ecosystem forever. The extinction of the Auk occurred around 1844. The cause was … A. forest-clearing B. overhunting C. a meteor D. a flood 20. When students studied their schoolyard to identify what human impact had on the numbers of organisms they recorded their data in a table. Two places where they likely studied were the … A. tarmac and the nature garden B. parking lot and the soccer field C. climbing apparatus and the tarmac D. climbing apparatus and parking lot ECOLOGY 21. A long-term change to an ecosystem will likely occur as a result of this type of human impact … A. clearing forests B. drought C. tsunami D. Flood 22. The introduction of a new species to an area will more than likely negatively impact the native species in that area. Scientists call this introduction of new species ... A. bioinvasion B. biodiversity C. biohazardous D. biomagnification ECOLOGY 23. Purple loosestrife has taken over many wetland and marshy areas. Because this was first introduced from Europe, it is not considered to be … A. native B. harmful C. invasive D. hazardous 24. The overabundance of European starlings causes problems in farmer’s fields and hazards at airports. This introduced species competes with other birds, such as bluebirds, woodpeckers and flycatchers for … A. predation B. insecticides C. nesting sites D. migration patterns ECOLOGY 25. The first living species to arrive in an area are Lichen which grows on bare rock and is considered to be the ... A. climax species B. pioneer species C. primary species D. invasive species 26. The gradual growth of an area that previously had a number of different species of organisms, like the regeneration of a burnt out forested area, is known as ... A. primary succession B. secondary succession C. succession and growth D. succession without interference ECOLOGY 27. When populations of many different species grow and replace one another within a particular area, a stable community of a diverse number of species, not easily replaced by other communities, will result. This is called a ... A. climax community B. climate community C. continuous community D. competitive community 28. DDT was found to negatively affect Bald Eagles. When the DDT entered the water system it was in a concentration of 0.000003 ppm. When the Bald Eagles ate fish further up in the food chain, the DDT concentration had increase to 25 ppm. The DDT concentration had increased about … A. 10,000 times B. 100,000 times C. 1, 000, 000 times D. 10, 000, 000 times ECOLOGY 29. Extinction occurs when no individuals of a species are left … A. in a particular area B. In a controlled area C. anywhere in the world D. In a specific ecosystem 30. Ginseng has been added to the list of living organisms that is Extinct, threatened or endangered in Canada. Ginseng is listed as … A. extinct B. extirpated C. threatened D. endangered ECOLOGY 31. Scientist and researchers study the life cycles of insects so they can better control them … A. teach them tricks B. without using pesticides C. and lengthen their overall life span D. to use as food for other research animals 32. Recovery programs developed to help rescue populations of the Peregrine Falcon were called … A. Tag and Monitor B. Controlled Habitat C. Captive Breeding D. Search and Rescue ECOLOGY 33. High cliffs are natural nesting spots for peregrine falcons, but when they are release close to a city, the Peregrine Falcons will build nests on… A. Elevator shafts B. Playground structures C. Ledges of tall buildings D. Chimneys and Smokestacks 34. The primary source of Ultraviolet radiation is the Sun. Luckily for living organisms on our planet, most of this deadly radiation doesn’t reach us, because it is … A. resistant to our atmosphere B. released as a by-product of ozone C. bounced off our atmosphere into space D. absorbed by oxygen in the atmosphere ECOLOGY 35. The case of the golden toad is one in which scientists and researchers have no idea about. What are they puzzled about? A. The change in colour B. The disappearance since 1988 C. The toad’s resistance to disease D. The lack of webbed feet it has developed 36. Scientists believe they know what has happened, with certain amphibian populations, around the world. The top 4 theories include: A. Climate change, thinning of the ozone, pollution, disease B. Disease, climate change, pollution, high volcanic activity C. Volcanic activity, hurricanes, pollution, climate variation D. Global warming, thinning of the ozone, pollution, earthquakes ECOLOGY 37. To determine your ecological footprint, all of the following calculations are necessary, EXCEPT for ... A. energy supply needed B. type of house you need C. amount of water you use D. amount of waste you produce 38. To reduce our ecological footprint, we can … A. more waste and recycle it take B. consume more water and less food C. longer more relaxing showers create D. use materials that require less energy to produce ECOLOGY 39. There are many waste-reducing practices, which are being suggested to lower the impact we are making in our environment. The most effective practice is ... A. reducing B. recycling C. reclaiming D. reusing RECLAIM ECOLOGY – Matching Question 1 There are 4 different kinds of monitoring practices that help us check the health of an ecosystem. Match the description with the type of monitoring it describes. 1 2 3 4 physical biological chemical environmental _____ Changes in weather _____ Quality of air, soil, and water _____ Changes in organisms _____ Changes in landscape ECOLOGY – Matching Question 2 Protecting the environment by reducing the size of our ecological footprint. Match the action with its waste reduction description. 1 2 3 4 fix it cut down on use use it again make it into something else _____ reduce _____ reuse _____ recycle _____ restore ECOLOGY – Illustration 1 Carbon is necessary for all life to exist on Earth. The carbon on the planet gets cycled throughout various ecosystems. Illustrate and label the CARBON CYCLE. ECOLOGY – Illustration 2 Bioaccumulation is the description of pollutants moving through various levels in a food web. Pollutants enter the food web usually at low concentrations and affect most organisms within a food web as it moves through the web. Illustrate and label an example of how BIOACCUMULATION affects organisms in a FOOD WEB. ECOLOGY – Puzzle The gradual process by which an ecosystem undergoes change can be gradual or sudden. This puzzle outlines some of the steps you might observe in PRIMARY and SECONDARY SUCCESSION. Fit the puzzle pieces together in the correct order. ECOLOGY – ANSWER KEY From this point on, slides will display the answers for … 39 Multiple Choice Questions Supplementary Questions 2 Matching Questions 2 Illustrating Questions 1 Puzzle Question Use the Mouse or Enter Key to advance slides at your own pace. ECOLOGY – ANSWER KEY Multiple Choice Questions 1 D 4 A 7 B 10 D 13 B 2 C 5 B 8 C 11 A 14 B 3 C 6 A 9 A 12 C 15 C 16 C 19 B 22 A 25 B 17 A 20 A 23 A 26 B 18 A 21 A 24 C 27 A 28 D 31 B 34 D 37 B 29 C 32 C 35 B 38 D 30 C 33 C 36 A 39 A ECOLOGY – ANSWER KEY Supplementary Matching Questions Matching Question 1 Matching Question 2 ___4___Changes in weather ___2___ reduce ___3___Quality of air, soil, and water ___3___ reuse ___2___Changes in organisms ___4___ recycle ___1___Changes in landscape ___1___ restore ECOLOGY – ANSWER KEY Supplementary Illustration Questions Carbon Cycle Bioaccumulation Concentration of POLLUTANT increases as you move higher in the Food Chain/Web CO2 in Atmosphere CO2 used in Photosynthesis Burning Fossil Fuels makes CO2 Birds & Humans Large Fish Respiration releases CO2 Plants eaten by Animals CO2 in decaying matter & waste Decaying plants create Fossil Fuels Plants produce Carbohydrates (organic compounds) Microorganisms and small fish AMOUNT OF POLLUTANT ECOLOGY – Puzzle ANSWER The gradual process by which an ecosystem undergoes change can be gradual or sudden. This puzzle outlines some of the steps you might observe in PRIMARY and SECONDARY SUCCESSION. Fit the puzzle pieces together in the correct order.