| A | B |
|---|
| hypothesis | a possible explanation for a set of observations or answer to a scientific questions; must be testable |
| variable | a factor in an experiment that can change |
| controlled experiment | an experiment in which only one variable is manipulated at a time |
| independent variable | the one factor that a scientist changes during an experiment; also called independent variable |
| dependent variable | the factor that changes as a result of changes to the manipulated, or independent, variable in an experiment' also called dependent variable |
| data | facts, figures, and other evidence gathered through observations |
| Earth Science | the science that focuses on planet Earth and its place in the universe |
| constructive force | a force that builds up mountains and landmasses on Earth's surface |
| destructive force | a force that slowly wears away mountains and other features on the surface of Earth |
| system | a group of related parts that work together |
| energy | the ability to do work or cause change |
| mass | the amount of matter in an object |
| volume | the amount of space something takes up |
| gram | unit used to measure mass |
| density | the amount of mass of a substance in a given volume; mass per unit volume |
| triple beam balance | used to measure the mass of an object |
