| A | B |
|---|
| controlled experiment | an experiment that tests only one factor at a time by using a comparison of a control group with an experimental group |
| hypothesis | an explanation that is based on prior scientific research or observations and that can be tested |
| mass | a measure of the amount of matter in an object |
| scientific methods | a series of steps followed to solve problems |
| theory | an explanation that ties together many hypotheses and observations |
| variable | a factor that changes in an experiment in order to test a hypothesis |
| volume | a measure of the size of a body or region in three-dimensional space |
| liter | the basic unit of volume in SI |
| meter | the basic unit of length in SI |
| gram | the basic unit of mass in SI |
