| A | B |
|---|
| control group | experimental group in which all variables remain constant, including the independent variable |
| controlled experiment | a test in which all variables are kept constant except the one being tested, results are due to changes in manipulated variable |
| data | collection of bits of information about the natural world |
| dependent variable | any change, in an experiment, that results from the manipulation of the independent variable |
| experiment | scientific test of a hypothesis used to determine whether the explanation is correct |
| experimental group | in a controlled experiment, the group in which the independent variable is manipulated |
| hypothesis | statement formed by analyzing observations and sorting through possible causes |
| independent variable | the only variable to be changed in a controlled experiment |
| International System of Measurement | a universal language of measurements and symbols used by scientists |
| law | a statement about events that always occur in nature |
| resolving power | ability of a microscope to distinguish two objects as separate things |
| scanning electron microscope | creates a 3D image by sweeping a beam of electrons across an object to explore cell surfaces & interactions |
| science | a process based on conducting, interpreting& explaining observations; testing explanations to create a sound body of knowledge |
| technology | application of knowledge gained through scientific study to real problems |
| theory | a major hypothesis that has withstood the test of time |
| transmission electron microscope | instrument that forms images of small, nonliving structures by passing a beam of electrons through the object (which is embedded in plastic or resin) |
