1) Which of the following best classifies the examples as biotic and abiotic factors? a) water is biotic and trees are abiotic b) birds are biotic and soil is abiotic c) grass is biotic and rocks are also biotic d) sunlight is abiotic and deer are also abiotic 2) When a fire sweeps through a forest many populations of trees, bushes, grasses, and animals are destroyed. The forest fire is an example of a a) density dependent factor b) dynamic factor c) density independent factor d) homeostatic factor 3) A group of rabbits live in a warren. This group of rabbits is best identified as a) an individual b) a population c) a community d) an ecosystem 4) Which of the following is true of a mutualistic relationship? a) organism 1 will benefit and organism 2 will be harmed b) organism 1 will benefit and organism 2 will be unaffected c) both organisms will benefit from the relationship d) neither organism will benefit from the relationship 5) What would most likely happen to a population of squirrels if the population of predatory hawks was removed? a) the squirrel population would increase b) the squirrel population would change randomly c) the squirrel population would decrease d) the squirrel population would not change 6) A shark kills and eats a albatross (bird) to eat for its nutrients. This relationship is an example of a) predator/prey b) coexistence c) competition d) mutualism 7) Which of the following most accurately shows the flow of energy in an ecosystem? a) producers -> sun -> consumers b) sun -> decomposers consumers c) sun -> producers -> consumers d) decomposers -> sun -> producers 8) When moving up an energy pyramid, approximately what percent of energy is available to be used by organisms in the next level? a) 100 b) 5 c) 50 d) 10 9) Which two gases are cycled through photosynthesis and cellular respiration? a) carbon dioxide, oxygen b) nitrogen, argon c) helium, carbon d) oxygen, nitrogen

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