Science chapter test
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20 terms
Terms | Definitions |
|---|---|
 Science | an organized way of gathering and analyzing evidence about the natural world |
| Observe | the act of noticing and describing events or processes in a careful, orderly way |
| Inference | A logical interpretation based on what scientists already know |
| Hypothesis | a scientific explanation for a set of observations that can be tested in ways that support or reject it |
| Controlled experiement | experiment in which only one variable is changed |
| Independent variable | the variable that is deliberatly changed |
| Dependent variable | the variable that is observed and that changes in repsonse to the independent variable |
| Control group | exposed to the same conditions as the experimental group except for one independent variable |
| Data | detailed records of experimental observations |
| Quantitative | numbers obtained by counting or measuring |
| Qualitative | descriptions and involve characteristics that cant be counted |
| Theory | well tested explaination that unifies a broad range of observations and hypotheses, and enables scientists to make accurate predictions about new situations |
| Bias | a particular preference or point of view that is personal, rather than scientific |
| Biology | study of life |
| DNA | complex information organisms need to live, grow, and reproduce in a genetic code written on a molecule |
| Stimulus | a signal to which an organism responds |
| Sexual reproduction | cells from two parents unite to form the first cell of a new organism |
| Asexual reproduction | a single organism produces offspring indentical to itself |
| Homeostasis | all organisms need to keep their internal environment relativley stable, even when xternal conditions change dramatically |
| Metabolism | the combination of chemical reactions through which an organism builds up or breaks down materials |
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