# Section 1.2 Study Guide

Conceptual Physics Applied
Study Guide Section 1.2
71 Points
Name: ________________________
Date: _________________________
Block/Day: ____________________
Complete the following package by filling in blanks and/or providing solutions to problems.
can be found in the textbook and your notes from class.
In science you need a __________________ way to describe the natural world. In physics,
many things are described with _____________________. Measurements such as __________,
mass, _____________ and temperature are important in science.
A measurement is a _________________ value that tells you how much. A measurement
communicates the ___________________ in a way that can be understood by others. For
example, 2 meters is a measurement because it has a __________________ (number), 2 and
a _____________, meters.
All measurements must have _______________. Without a unit a measurement cannot be
________________________. Physics uses a set of units that have been agreed upon around
the world.
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Distance is the amount of separation between __________ unique points. You can also think
of distance as how far apart __________________ objects are. Distance is measured in units
of ______________________. Some commonly used units of length include inches, miles,
_________________, kilometers and ________________. It is important to always specify which
____________________ unit you are using for a measurement.
The __________________ System is used for everyday measurements in the United States.
During the 1800s, a new system of measurement - The ________________ System – was
developed in France. The goal of this system was for all units of measurement to be related
and for the units to form a base-_______ or _______________________ system. In the 1960s
the Metric System was revised and simplified, and a new name was adopted – The
International System of Units or ______________for short. Almost all fields of science
worldwide use SI units because they are _______________ to work with. In SI, there are ____
millimeters in a centimeter, _________ centimeters in a meter and ____________ meters in a
kilometer. Factors of 10 are easier to ________________ and work with __________________.
We often want to know how things change over ______________. Many laws of physics tell
us how things _________________ over time. We describe a quantity of time. The question
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“____________ much time?” is asking for a ______________ of time. A quantity of time is also
called a time ___________________. Any calculation involving time that you do in physics will
use _____________ intervals, not time of ___________. Many problems in science use time in
_________________________.
The ______________________ is the basic unit of time in both the SI and the English systems.
There are 60 seconds in one ______________ and 3,600 seconds in an ___________. In many
experiments, you will observe how things __________________ with time. For example, when
you drop a ball, it _________________ to the ground. The graph shows that it takes the ball
about 0.45 ________________ to fall a distance of 1 ________. When making graphs of results
from experiments, the time almost always goes on the ____________________ or ___________.
The words _______________ and precision have special _____________ in science. Accuracy
is how close a measurement is to its ____________________ or “true” value. Precision does
not have the _______________ meaning as accuracy. Precision describes how close together
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several _________________________ measurements or events are to one another.
Good _________________
Poor _______________
Poor __________________
Good _________________
Good ______________
Poor __________________
_____________________ is another important term to understand when you are working with
measured quantities. Resolution refers to the _______________________ interval that can be
measured. The resolution of a metric ruler is _________________ mm. You can think of
resolution as the “______________________” of a measurement. A measurement with lots of
_______________________ is a very “sharp” measurement.
All measurements involve a degree of ______________________. The object in Figure 1.11 is
definitely longer than 2.6 ____________. Not every one would agree on the third digit of the
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measurement. One person ________________ read the measurement as 2.63 cm. Another
might ______________ it is closer to 2.65 cm. It is ______________ to make a measurement of
the exact true value of anything, except when ____________________ “things.” Using the ruler
in Figure 1.11, the best answer for the length of the paper clip is _________________ cm. The
last digit, _______, represents the smallest amount, 0.05 cm, and it is ____________________.
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