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Ch. 1 Sections 2 & 3

Ch. 1 Section 2 & 3

kingdoms a system of grouping organisms that divides life into 6 categories
domains the three main divisions of all organisms
ecology the branch of biology that studies organisms interacting with each other and with the environment
ecosystems communities of living species and their physical environments (all elements of their surroundings: temperature, weather, water, gases, etc. )
evolution the process in which the inherited characteristics within populations change over generations (cross breeding between two different organisms which can form a new species)
natural selection a theory that states that organisms that have certain favorable traits are better able to survive and reproduce successfully than organisms without these traits
adaptations traits that improve an individual's ability to survive and reproduce
scientific method an organized approach to learn how the natural world works
observation the act of perceiving a natural occurrence that causes someone to pose a question
hypothesis a proposed explanation for the way a particular aspect of the natural world functions
prediction a statement that forecasts what would happen in a test situation if the hypothesis were true
experiment is used to test a hypothesis and its predictions
control group the group that provides a normal standard against which the scientist can compare the results of the experimental group
experimental group is identical to control group except for one factor, the independent variable
independent variable the different factor in the experiment
dependant variable the factor that "responds" because it is affected by the independent variable; what is being measured?
theory when a set of related hypothesizes is confirmed to be true
peer review where scientists who are experts in the field anonymously read and critique that research paper
Created by: WalshC20



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