PSC 1515 chapter 1
1000 m3 of pure water has a mass of what? - correct answer-1 liter (1000m3) of pure water
at standard temperature and pressure has 1 kilogram of mass.
By what factor do metric prefixes use? - correct answer-Factor of 10
Control group - correct answer-The control group is defined as the group in an experiment or
study that does not receive treatment by the researchers and is then used as a benchmark
to measure how the other tested subjects do. The situation used as the basis of comparison
is called the control group.
Controlled experiment - correct answer-Compares two situations in which all the influencing
factors are identical except one.
Data - correct answer-Is the measurement information to describe something. Can be used
to describe objects, conditions, events, or changes that might be occurring.
Density - correct answer-The radio of mass to volume is called DENSITY (p). Density is
defined as mass per unit volume, which means mass of one volume. p= Mass/volume
p=m/V
English system of measurements - correct answer-The English system of measures is a
collection of measures for length, volume, weight, area, etc. that have their roots in hundreds
of years of history. Where originally based on parts of the human body, and there were
problems with this early units because everyone had different sized body parts. The sizes of
the various units were gradually standardized later.
Experiment - correct answer-Is a recreation of an event or occurrence in a way that enables
a scientist to support or disprove a hypothesis.
Hypothesis - correct answer-
Know equation and the effects on density from either mass or volume - correct
answer-p=m/V . Density increases as mass increases, vice versa
Density increases as volume decreases, vice versa.
This is because mass, the numerator of the equation, would cause the final answer (density)
to increase when it increases, assuming the volume remains constant. And when the
denominator of a fraction is large, in this case volume, it would cause the final answer to
become smaller.
Know the common symbol for density - correct answer-p
Length - correct answer-The standard unit for length is the METER (m). The meter is defined
as the distance that light travels in a vacuum during a certain time period, 1/299,792,458
seconds. A meter is slightly longer than a yard, 39,3 inches. When you are trying to visualize
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