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Science Unit Test 1

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yutejino's version from 2018-11-01 22:02

Section

Question Answer
List the 3 types of symbiotic relationshipsMutualism, Commensalism, and Parasitism
What does a food chain illustrate?Who eats whom in an ecosystem
What are food webs?Visual representation of Interconnecting Food Chains
What are the trophic levels?The feeding levels
Do producers and autotrophs make their own food?Yes
Do heterotrophs make their own food?No
What is a niche?The organsim's role in the ecosystem
What is a species?a group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding.
What is immigration?Movement of individuals into a population
What is emigration?Movement of individuals out of a population
What is carry capacity?The maximum amount of individuals of a particular species that the enviroment can sustain.
What does ecosystem mean?A system, or a group of interconnected elements, formed by the interaction of a community of organisms with their environment.
What are 3 density dependent factors?Predation, Disease/parasitism, and competition
What are some density independent factors?Natural disaster or pollution
What is carbon that is found in organic thngs called?Organic Carbon
What is carbbon that is found in organic things called?Inorganic Carbon
Decomposition can release carbon back into the atmosphere, true or false?True
Carbon Dioxide levels are ___% higher than they were 200 years ago.200
How much % of our atmosphere is made of nitrogen?78
What are the three ways that nitrogen can be fixed?Lightning, Industrially, and biologically
Nitrogen can be fixed by decomposition aswell, T or F?True
What is nitrification?Nitrifying bacteria in the soil converts ammonia into nitrate, and then into nitrite
What is DEnitrification?Denitrifying bacteria turn nitrates back into nitrogen. The bacteria used the nitrates instead of oxygen for energy
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