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Unit 1

Science 7

QuestionAnswer
Abiotic Nonliving (has not ever been alive and never could be alive)
Biotic Living organisms (fulfills the 6 characteristics of living things)
Organism/Individual Any living thing
Population More than one of the same type (species)
Community Several different populations that interact in a specified area
Ecosystem All of the biotic and abiotic factors living together and interacting in a specified area
Biome A group of ecosystems with similar climates and organisms found throughout the world
Biosphere The part of Earth where life exists
Population density Number of organisms in a given area. (NJ is a very densely populated area)
Direct Observation A type of population determination where every organism is counted. Best for organisms that don’t move like plants
Indirect Observation A type of population determination where an estimate of the number of individuals is made based on looking at nest, burrows, tracks, droppings etc
Sampling A type of population determination where one counts the number of organisms in a small area (sample) and then multiplying to find the number in a larger area.
Mark and Recapture population determination, traps are used to capture animals & mark them. The animals are returned to their environment. Over time, groups of animals are trapped, they are checked for tags & a mathematical formula is then used to estimate population size.
Immigration Populations moving INTO an area
Emigration Populations EXITING and area
Reproductive Potential The theoretical unlimited growth of a population over time (if conditions are right)
Limiting Factors any biotic or abiotic factor that acts in some way to limit the number of individuals that survive and reproduce in a population
Carrying Capacity The maximum number of individuals an environment can support
Created by: mkolinchak
 

 



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