1) In the clouds, ___________ occurs and water molecules stick to each other and get heavier a) transpiration b) condensation c) evaporation d) precipitation 2) What is it called when water falls from the clouds to the Earth's surface? a) transpiration b) condensation c) evaporation d) precipitation 3) Transpiration is a) how water leaves plants b) how water enters plants through their roots c) rain d) water vapor freezing 4) Evaporation occurs when a) water goes from solid to liquid b) water goes from gas to liquid c) the energy from the sun heats up water, causing it to turn to a vapor d) water leaves plants 5) Which cycle requires special bacteria to "fix" a substance (N) so it can be useful for organisms? a) nitrogen cycle b) carbon cycle c) water cycle 6) All living things contain ___________ which can be released from animals through waste, decay and respiration. a) water b) carbon c) nitrogen dioxide 7) In a food web/energy pyramid, which trophic level has the most organisms and greatest amount of energy availble? a) producer b) primary consumer c) secondary consumar d) apex predator 8) Which level of consumers has the most energy available? a) primary b) secondary c) tertiary 9) What percent of energy is transferred from one trophic level to the next? Remember some is used up by normal life activities. a) 5% b) 10% c) 100% d) 20% 10) What is the process through which producers, like plants, produce food? a) cellular respiration b) water cycle c) photosynthesis d) transpiration 11) Which process breaks down food so that organisms can use it to power their daily activities? a) photosynthesis b) water cycle c) transpiration d) cellular respiration 12) If I have a fenced in area with a large population of rabbits and add in a group of their predators, like foxes, what will happen to the rabbit population? a) increase b) decrease c) stay the same 13) In predator-prey relationships, a change in one... a) will not affect the other b) will always increase the other c) will always decrease the other d) will have an affect on the other 14) What kind of limiting factors (things that control population size) are living, like predation, parasitism, invasive species, and disease caused by bacteria? a) limiting b) biotic c) abiotic 15) What kind of limiting factors (things that control population size) are non-living like pH, amount of sunlight, mineral levels, living space? a) limiting b) biotic c) abiotic 16) If foxes are introduced to an area and start eating the rabbits, the rabbit population will... a) increase b) descrease c) stay the same 17) If the rabbit population decreases due to excess predators, their will be __________ competition for the plants that rabbits eat. a) decreased b) increased c) same 18) If there is less competition for the plants that rabbits eat, because the rabbit population decreased, what will happen to the squirrel population that feed on the same plants? a) decrease b) increase c) stay the same 19) In which symbiotic relationship is one organism helped and the other harmed? (+,-) ex. tick feeding on your blood a) mutusalism b) commensalism c) parasitism 20) In which symbiotic relationship are both organisms helped? (+,+) ex. clown fish and sea anemone a) mutualism b) commensalism c) parasitism 21) In which symbiotic relationship is one organism helped and the other unaffected? (+,0) ex. Birds eating the bugs stirred up by grazing farm animals a) mutualism b) commensalism c) parasitism 22) A __________ is where an organism lives. ex. Poison dart frogs live in the rainforest a) habitat b) niche 23) A __________ is the job an organism has in its environment. ex. bacteria decompose dead things a) habitat b) niche 24) ______________ are characteristics that help an organism survive and reproduce in its environment. a) traits b) characteristics c) structures d) adaptations

Grade 7 Science BM Review

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