| A | B |
|---|
| experimental group | the group being tested in an experiment |
| observation | information you get using your five senses |
| control group | group used to compare experimental results in an experiment |
| hypothesis | possible explanation for a problem using what is known and observed, an educated guess |
| theory | explanation of things or events based on knowledge gained from many observations and investigations; explains why |
| scientific law | statement about what happens in nature that seems to be true all the time; does not explain why or how something happens |
| scientific method | steps often used in solving problems |
| experiment | procedure used to test a hypothesis |
| independent variable | factor that, as it changes, affects the measure of another variable |
| dependent variable | factor that changes as a result of changes in the other variable |
| constant variable | variable stays the same during an experiment |
| bias | occurs when scientist's expectations change how the results of an experiment are viewed |
| base unit for mass | gram (g) |
| base unit for volume | liter (L) |
| base unit for time | second (s) |
| base unit for length | meter (m) |
