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phy sci ch. 1

vocab

TermDefinition
standard exact quantity that people agree to use to compare measurements
si international system of units
volume amount of space occupied by an object
matter anything that takes up space and has mass
mass measurement of the quantity of matter in an object
density mass per unit volume of material
graph visual display of information or data
technology application of scientific knowledge to benefit people
society group of people that share similar values and beliefs
scientific law statement about what happens in nature that seems to be true all the time (doesn't explain why or how something happens)
theory explanation of things or events based on knowledge gained from many observations and investigations
bias occurs when a scientist expectations change how the results of an experiment are viewed
control standard by which the test results can be compared
constant a factor that does not change when other variables change
independent variable variable changed to see how it will affect the dependent variable
dependen t variable factor that changes as a result of changes in other variables
variable quantity that can have more than a single value
experiment to test the effect of one thing on to another using a control
hypothesis possible explanation for a problem using what you know and observe
scientific methods pattern of investigation procedures
model represents an idea, object, or event that's too big, too small, too complex, or too dangerous to observe or test directly
Created by: madelyncoincon1
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