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Science Chapter 2 - Measurement
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Terms in this set (31)
measurement
a way to describe the world with numbers
estimation
approximated measurement based on previous experience
precision
a measure of how close a series of measurements are to one another
Accuracy
A description of how close a measurement is to the true value of the quantity measured.
significant digits
the number of digits in a measurement that are known with a certain degree of reliability
SI units
International System of Units
meter
unit used for measuring distance
length
Distance between two points
centimeters
A metric unit of length that is 1/100 of a meter
kilometers
used to measure large distances.
Volume
The amount of space an object takes up
cubic meter (m^3)
SI unit of volume
length x width x height
Used to calculate the volume of a regular object
Volume by Immersion
The act of finding the volume of an irregular shaped object by placing it in a graduated cylinder with a known volume of water and seeing how much the water level is raised.
mass
the amount of matter in an object
kilogram
SI unit for mass
weight
A measure of the force of gravity on an object
newton
SI unit of force
temperature
A measure of the average energy of motion of the particles of a substance.
kelvin
SI unit for temperature
time
interval between two events
second
SI base unit for time
rate
amount of change of one measurement in a given amount of time
Scientific Illustrations
often make information more clear than written text can
Drawings
can emphasize only neccessary details or show things you can't see
Photographs
Shows us exactly what something looks like at an exact moment in time
tables
An arrangement of data made up of horizontal rows and vertical columns.
graph
is used to collect, organize, and summarize data in a visual way.
line graph
A graph that uses line segments to show changes that occur over time
bar graph
a graph that uses vertical or horizontal bars to show comparisons among two or more items
circle graph
A data display that uses pieces of a circle to show parts of a whole
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