| A | B |
|---|
| science | an organized way of using evidence to learn about the natural world |
| observation | process of gathering information about events or processes in a careful, orderly way |
| data | information gathered from observation |
| inference | logical interpretation based on prior knowledge |
| hypothesis | proposed scientific explanation for a set of observations |
| spontaneous generation | idea that life can arise from nonliving matter |
| controlled experiment | experiment in which only one variable is changed at a time |
| maiputlated variable | variable that is deliberately changed |
| responding variable | variable that changes because of the manipulated variable |
| variable | factor in an experiment that can change |
| theory | a well tested explanation that unifies a broad range of observations |
| biology | science that studies life |
| cell | smallest unit if an organism that can be considered alive |
| metabolism | combination of chemecal reactions in which an organism breaks down or builds up materials as it carries on life processes |
| stimulus | signal to which an organism responds |
| homeostasis | process by which an organism maintains a relatively stable internal environment |
| evolution | change of a group of organisms over time |
| metric system | decimal system of measurement whose units are based on certain standards based on multiples of ten |
| microscope | device that magnifies images too small for the unaided eye to see |
| light microscope | produces magnified images by focusing visible light rays |
| electron microscope | produces magnified images by focusing beams of electrons |
| compound light microscope | uses two lenses to form image |
| cell culture | group of cells grown in a nutrient solution from a single cell |
| cell fractionation | technique in which cells are broken into pieces and the different cell parts are separated |
