8 th Grade Science Organisms and their Environment Review

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1 8 th Grade Science Organisms and their Environment Review

2 #1 The tree is an example of a in the food web. Producers perform photosynthesis. A: Prey B: Decomposer C: producer D: Herbivore

3 C. Producer

4 #2 In this food web, which of these organism has the greatest number of food sources? A: Snake B: Deer C: Cricket D: None of these

5 B. Deer

6 #3 Identify one predator-prey relationship in this food web. Predator - Mountain lion A: B: Prey - Deer Predator Deer Prey - Tree Predator Snake C: Prey - Cricket D: All of these

7 A. Predator - Mountain lion Prey - Deer

8 #4 Heartworms live inside of a dog s heart and will eventually kill the dog. The heartworm is an example of a. A: mutualism B: parasite C: symbiosis D: omnivore

9 B. parasite

10 #5 What organisms break down the remains of plants and other organisms. These organisms are necessary to insure that the atoms recycle back into the environment. A: Producers B: Consumers C: Decomposers D: Omnivores

11 C. Decomposers

12 #6 Organism that produce their own food. A: producer B: comsumer C: population D: predator

13 A. producer

14 #7 A symbiotic relationship between to organisms in which one benefits while the other is harmed. A: commensalisms B: parasitism C: mutualism D: matabolism

15 B. parasitism

16 #8 A symbiotic relationship between to organisms in which both organisms benefit. A: commensalism B: parasitism C: mutualism D: matabolism

17 C. mutualism

18 #9 A symbiotic relationship between to organisms in which one benefits while the other neither benefits nor is harmed. A: commensalism B: parasitism C: mutualism D: matabolism

19 A. commensalism

20 #10 Consumers that eat both plants and animals. Example: Mouse A: herbivore B: omnivore C: carnivore D: ecoviore

21 B. omnivore

22 #11 Consumers that eat only plants. Examples: Grasshopper, Rabbit A: ecoviore B: carnivore C: herbivore D: omnivore

23 C. Herbivore

24 #12 Consumers that eat only meat. Example: Mountain Lion A: Carnivore B: Producer C: Parasite D: Herbivore

25 A. Carnivore

26 #13 A close, long-term relationship between two or more species. A: Symbiotic relationship B: Stimulus relationship C: Homeostasis D: Unitarianism

27 A. Symbiosis relationship

28 #14 An organism that cannot make its own food. A: prey B: symbiosis C: consumer D: producer

29 C. consumer

30 #15 A diagram that shows the energy flow from one organism to the next. A: B: Web chain Food chain C: Both of these D: Neither of these

31 B. Food chain

32 #16 A diagram that consists of many overlapping food chains A: Food web B: Food chain C: ecology D: Food chart

33 B. Food web

34 #17 A unit consisting of all the living and nonliving things in a given area that interact with one another. A: biosphere B: ecosystem C: community D: population

35 B. ecosystem

36 #18 Living things in an ecosystem. A: abiotic B: ecology C: ecosystem D: biotic

37 D. Biotic

38 #19 Non-living things in an ecosystem. A: abiotic B: biotic C: ecology D: ecosystem

39 A. Abiotic

40 #20 The original source of energy in a food web. A: Moon B: Sun C: Plants D: Consumers

41 B. Sun

42 #21 What do the arrows represent in this food web? The energy flow from A: provider to user. B: They animal which the organism consumes. C: Both D: Neither

43 A. The energy flow from provider to user.

44 #22 What would happen if the snakes are killed in this ecosystem? The mice would increase The mice would decrease A: The corn would decrease B: The corn would increase The hawks would decrease The hawks would decrease C: Both D: Neither

45 A. The mice would increase The corn would decrease The hawks would decrease

46 #23 What would happen if a farmer sprayed a pesticide that killed all the crickets? The corn would increase, but all of the animals above the cricket on the food chain would decrease A: B: The mice would increase The corn would increase The hawks would increase C: Both D: Neither

47 A. The corn would increase, but all of the animals above the cricket on the food chain would decrease

48 #24 In a food chain, the amount of energy as it passes from one level to the next A: Increases B: Decreases C: Stays the same D: Sometimes increases and sometimes decreases

49 B. Decreases

50 #25 When the mouse eats the corn in this food chain, what form of energy passes directly from the corn to the mouse? A: Heat B: Light C: D: Kinetic Chemical

51 D. Chemical

52 #26 Give an example of organisms competing for a biotic factor in an ecosystem. Snake and hawk A: preying on the mouse B: Hawk and mouse preying on the shrubs Rabbit and snake C: preying on the cricket D: None of these

53 A. Snake and hawk preying on the mouse

54 #27 Give an example of organisms competing for an abiotic factor in an ecosystem. A: Organisms competing B: for prey Organisms competing for water C: Organisms competing D: for space None of these

55 B. Organisms competing for water C. Organisms competing for space

56 #28 What happens if ecosystems change and a population of organisms does not adapt to the change? A: Population will B: increase Population could become extinct C: Both D: Neither

57 B. Population could become extinct

58 #29 How are humans increasing competition within ecosystems? Changing ecosystems A: B: by cutting down trees Decreasing animal populations by hunting C: Decreasing water supplies through D: pollution All of these

59 D. All of these

60 #30 How has the BP Oil Spill negatively impacted the ecosystems in the Gulf of Mexico A: Destroyed plants eaten B: by fish Killed fish C: Killed sea birds D: All of these

61 D. All of these

62 #31 a human-made underwater structure, built to increase marine life. A: Barrier reef B: Artificial reef C: Marine reef D: None of these

63 B. Artificial reef

64 #32 The Earth's land area, including its manmade and natural surface and sub-surface features. A: Space environment B: Marine environment C: Terrestrial environment D: None of these

65 C. Terrestrial environment

66 Great Job!!!! Thank you for playing!

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