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Ch. 1 Sections 2 & 3
Ch. 1 Section 2 & 3
| Term | Definition |
|---|---|
| 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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