| 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 |
| scientific 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 |
| bias | occurs when what the scientist expects changes how the results are viewed |
| model | represents an idea, event, or object to help people understand it |
| dependent variable | a variable that chandes as another variable changes |
| independent variable | scientist manipulate |
| graph | a visual display of data |
| density | mass per unit volume; tells how concentrated the object is |
| standard | an agreed-upon quantity used for comparison |
| technology | applied science |
| science | a system of knopwledge and the methods you use to find that knowledge |
| accuracy | it describes how well the results of a measurement agree with the real value |
| precision | the degree of exactness of a measurement and/or how consistent are your measurements |
| physics | the study of matter and energy |
| measurement | it is a comparison between an unknown quantity and a standard |
| linear relationship | a straight line on a graph shows this between the two variables |
| line of best fit | on a graph , it is the line drawn as close as possible to all of the data points |
| quadratic relationship | it exists when one variable depends on the square of another |
| significant digits | the valid digits in a measurement |
| dimensional analysis | the method of treating units as algebraic quantities, which can be cancelled |
