| A | B | 
|---|
| experimental group | "guinea pigs"  -- the real test group in an experiment | 
| observation | something noted in an experiment or noticed about the world around you | 
| control group | part of an experiment treated "normally" -- used to compare experimental results | 
| hypothesis | untested idea, an educated guess | 
| theory | idea in science with at least some evidence or observations supporting it, useful in making predictions | 
| direct observation | an observation made on something you can see or measure "firsthand" | 
| indirect observation | observation about something you can't see or measure "firsthand" -- you must observe HOW OTHER THINGS ARE AFFECTED | 
| law | idea in science proven correct repeatedly without exception | 
| inference | a conclusion or explanation based on observations made about something | 
| scienctific method | steps often used in solving problems in science  (can be helpful in solving any problem) | 
| experiment | used to test a hypothesis | 
| procedure | something DONE in an experiment | 
| science | search for the true nature of the world and how it works based on our observations of it |