Chapter 1 Vocabulary Cards Flashcards
Bias
occurs when what the scientist expects changes how the results are viewed .
Constant
A factor that does not change when other variables change
Control
the standard by which the test results can be compared
Density
The mass per unit volume of a material.
Dependent Variable
the value changes according to the changes in other variables
experiment
tests the effect of one thing on another using controlled conditions
graph
a visual display of information or data
hypothesis
a possible explanation for a problem using what you know and what you observe
independent variable
the variable you change to see how it will affect the dependent variable
mass
a measurement of the quantity of matter in an object
model
represents an idea, event, or object to help people better understand it
scientific law
a statement about what happens in nature and that seems to be true all the time
scientific method
an organized set of investigation procedures
SI
the international system of units; a standard universally accepted and understood by scientists throughout the world
standard
an exact quantity that people agree to use to compare measurements
