| Term | Definition |
|---|
| science | the organized way of using evidence to learn about the natural world |
| observation | the use of one or more senses to gather information |
| data | evidence |
| inference | logical interpretation based on prior knowledge and experience |
| hypothesis | possibe explanation for a set of observations or possible answer to a scientific question |
| science | the body of knowledge that scientists have built up |
| data | information gathered from observations |
| spontaneous generation | the disproven hypothesis that life could arise from nonliving matter |
| controlled experiment | a test of the effect of a single variable by changing it while keping all other variables the same |
| manipulated variable | factor in an experiment that a scientist purposely changes |
| manipulated variable | independent variable, syn. |
| responding variable | factor in an experiment that a scientist wants to observe, which may change in response to the manipulated variable |
| responding variable | dependent variable, syn. |
| theory | well-tested explanation that unifies a broad range of observations |
| biology | science that seeks to understand the living world |
| cell | collection of living matter enclosed by a barrier that separates the cell from its surroundings |
| homeostasis | process by which organisms maintain a relatively stable internal environment |
| sexual reproduction | process by which cells of two different parents unite to produce the first cell of a new organism |
| asexual reproduction | process by which a single parent reproduces by itself |
| metabolism | set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes |
| stimulus | a signal to which an organism responds |
| cell | basic unit of all forms of life |
| metric system | decimal system of measurement based on certain physical standards and scaled on multiples of ten |
| microscope | device that produces magnified images of structures that are too small to see with the unaided eye |
| compound light microscope | microscope that allows light to pass through a specimen and uses two lenses to form an image |
| electron microscope | microscope that forms an image by focusing beams of electrons onto a specimen |
| cell culture | group of cells grown in a nutrient solution from a single original cell |
| cell fractionation | technique in which cells are broken into pieces and the different cell parts are separated |
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