the act of using one or more of your senses to gather information and take note of what occurs

• observation
• analysis
• variable
• constant

an item or factor that does not change

• observation
• analysis
• variable
• constant

any factor that can have more than one value or characteristic

• observation
• analysis
• variable
• constant

a group of subjects which is exposed to the variable under study

• independent variable
• dependent variable
• experimental group
• control group

factor that is changed by the investigator to observe how it affects a dependent variable.

• independent variable
• dependent variable
• experimental group
• control group

test group which contains the same factors and traits as the experimental group, but is not manipulated 

• independent variable
• dependent variable
• experimental group
• control group

act of examining carefully and in detail to identify causes, key factors, or possible results

• observation
• analysis
• variable
• constant

factor a scientist observes or measures

• independent variable
• dependent variable
• experimental group
• control group

explanation of the observations or events
based on knowledge gained from many observations and careful investigations

• scientific law
• scientific theory
• empirical evidence
• controlled experiment

information acquired by observation or experimentation; data recorded and analyzed by scientists

• scientific law
• scientific theory
• empirical evidence
• controlled experiment