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Unit 01
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Key Concepts:
Terms in this set (21)
bar graph
a graph in which bars are used to represent data. A bar graph is usually used to compare different objects
constant
a variable that remains the same throughout all tested experiments
control
a group or individual test subject in an experiment that is not exposed to the independent variable
dependent variable
what is being measured or counted in the experiment as a result of changing the independent variable
hypothesis
a prediction of what will happen in an experiment including mention of the dependent and independent variables
independent variable
the variable that is manipulated or changed in order to see if there is an effect on another variable
line graph
a graph using points connected by line segments. A line graph is usually used to show how something changes over time
negative relationship
a relationship between two variables. As one variable increases, the other variable tends to decrease
mass
the amount of matter in an object
model
a reproduction of a system that cannot easily be viewed, tested, or used in its normal state, for example, cell model in biology or architectural designs
pie chart
a graph in which parts of a whole are represented as "slices" of a pie. A pie chart usually shows percentage or fraction data. Also called "circle graphs."
positive relationship
a relationship between two variables. As one variable increases, the other variable also tends to increase
scale
the amount represented by each unit on an axis
scatter plot
a graph of two;variable data. Used to show relationships between two variables
scientific method
series of steps that help to investigate a question.
theory
a tested, scientifically supported idea that explains how a phenomenon happens (compared with a law which is a tested, scientifically supported idea that explains that a phenomenon happens)
variable
a factor that can be changed in an experiment
volume
the amount of space that a substance or object occupies, or that is enclosed within a container
conceptual model
ties together many ideas in an attempt to explain a phenomenon
mathematical model
equation or set of equations that takes many factors or variables into account, for example, weather predictions
physical model
physical representations of the subject being studied
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