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PHYSICS CHAPTER
2.1
2 Study Guide Fill In the blanks as you study the chapter.
THE MEASURE OF SCIENCE
The Metric System
In the metric system, units of different sizes are related by (1). The initials (2) stand (or the International System
of Units. The three fundamental units measure the quantities (3) and (4). The meter is the SI unit of (5). The
second is the SI unit of (6). The kilogram is the SI unit of (7). Other units are called derived units because they
are (8) of fundamental units.
Scientific Notation
Scientific notation is based on (9) notation. In scientific notation, a measurement is expressed as a number
between (10) and (11) multiplied by a whole-number (12) of ten. When numbers are converted to scientific
notation, the decimal point is moved until there is one (13) digit to the (14) of the decimal point. The number of
places the decimal point is moved is used as the (15) of ten. If the decimal point is moved to the (16), the
exponent becomes larger. If the decimal point is moved to the (17), the exponent becomes smaller.
Prefixes Used with SI Units
SI units are changed by powers of (18) by the use of prefixes. The prefix for one tenth is (19). The prefix for one
thousandth is (20). The prefix that changes a unit by one thousand is (21). All metric units use (22) prefixes.
Scientific Notation in Mathematical operations
When numbers are in scientific notation, they may be added or subtracted if the numbers have the same (23).
After the numbers are added, the exponent is (24). If the powers of ten are not the same, the (25) must be
moved, and the (26) must be changed before the numbers can be added. For multiplying numbers in scientific
notation, the (27) do not have to be the same. After the numbers are multiplied, the exponents are (28) and the
units are (29).
1
11
21
2
12
22
3
13
23
4
14
24
5
15
25
6
16
26
7
17
27
8
18
28
9
19
29
10
20