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Chapter One Vocab
Of Prentice Hall Physical Science
38
Science
8th Grade
02/26/2011

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Term
science
Definition
the study of the natural world
Term
observing
Definition
using one or more senses to gather information
Term
inferring
Definition
when you explain your observations
Term
predicting
Definition
making a forecast of what will happen in the future based on past experience or evidence
Term
chemistry
Definition
the study of the properties of matter and how matter changes
Term
physics
Definition
is the study of matter, energy, motions, and forces, and how they interact
Term
scientific inquiry
Definition
the different ways scientists study the natural world
Term
hypothesis
Definition
the possible answer to a scientific question or explanation for a set of observations
Term
parameter
Definition
a factor that can be measured in an experiment
Term
controlled experiment
Definition
an investigation in which only one parameter is manipulated at a time
Term
data
Definition
the facts figures and other evidence gathered through observations
Term
communicating
Definition
sharing the iddeas and conclusions with others through writing and speaking
Term
model
Definition
a picture, diagram, computer image or other representation of an object or process.
Term
scientific theory
Definition
a well-tested explanation for a wide range of observations or experimental results
Term
scientific laq
Definition
a statement that describes what scientists expect to happen every time under a particular set of conditions
Term
SI
Definition
and abbreviation for International System of Units used to measure length volume mass density
Term
weight
Definition
is a measure of the force of gravity on you
Term
mass
Definition
is a measure of the amout of matter an object contains
Term
volume
Definition
is the amount of space an object takes up
Term
meniscus
Definition
the curved upper surface of a liquid in a column of liquid
Term
density
Definition
mass per unit volume
Term
celsius scale
Definition
the temperature scale on which water freezes at 0 degrees and boils at 100 degrees
Term
Kelvin scale
Definition
the temperature scale on which zero is the temperat which no more energy can be removed from matter
Term
estimate
Definition
an approximation of a number based on reasonable assumption
Term
accuracy
Definition
refers to how cloase a measurement is to the true or actual value
Term
reproductibility
Definition
referss to how close a group of measurements are to each other
Term
significant figures
Definition
a measurement including all of the digits that have been measured exactly plus one digit whose value has been estimated
Term
precision
Definition
is a measure of the exactness of a measurement
Term
graph
Definition
a picture of your data
Term
horizantal axis
Definition
the x axis is the graph line that runs left to right
Term
vertical axis
Definition
the y axis is the graph line that runs up and down
Term
origin
Definition
the points where the two axes cross
Term
coordinate
Definition
is a pair of numbers used to determine the positions of a point on a graph
Term
data point
Definition
the point showing the location of the intersection
Term
line of best fit
Definition
is a smooth line that reflects the general pattern of a graph
Term
linear graph
Definition
a line graph in which the data points yeild a straight line
Term
slope
Definition
the steepness of the graph line
Term
nonlinear graph
Definition
a line graph in which the data points do not fall along a straight line
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