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PS-Unit1-Gullett

PhysicalSci-Chapter 1 Vocabulary

TermDefinition
observation using tools and senses to document facts, used to make hypothesis and predictions
data recorded observations / facts
hypothesis a written answer for a scientific question that includes a prediction that is testable
experiment a controlled study used to test a hypothesis by testing the effects of one thing on another
independent variable the condition or factor that is changed by the scientists, goes on the x-axis of a graph
dependent variable data being measured and collected, goes on the y-axis of a graph
constant the conditions of an experiment that do not change
pie graph graph used to compare proportions (percentages) in different categories such as water use by consumers
bar graph graph used to compare different categories for a continuous variable such as average household water use by county
line graph graph used to illustrate the data of an independent variable that is collected continuously such as heart rate over time or rate of ice melting
scientific methods the pattern of investigation procedures
variable something in an experiment that changes, either on purpose or as the result of changing something else.
experimental control the trial or group that is used to compare the experimental trial or group to. It is often viewed as "normal conditions"
bias this occurs when a scientist's expectations change how the results of an experiment are analyzed or how the conclusions are made
model this represents an ides, event, or object to help people better understand it.
volume the amount of space occupied by an object
matter anything that has mass and takes up space
mass a measurement of the amount of matter in an object
density the ratio of mass to volume that tells the amount of matter in a given volume
x-axis the horiztontal axis of a graph that corresponds to the independent variable.
y-axis the vertical axis of a graph that corresponds to the dependent variable
Created by: lpgullett
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