Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
|
|
|
1.
|
Chemistry is defined as the study of the composition and structure of materials
and a. | the categories
of matter. | c. | the electrical
currents in matter. | b. | the changes in matter. | d. | molecules in living things. | | | | |
|
|
|
2.
|
Chemical properties a. | include changes of state of a
substance. | b. | include mass and color. | c. | include changes
that alter the identity of a substance. | d. | can be observed without altering the identity of a
substance. | | |
|
|
|
3.
|
Two
features that distinguish matter are a. | mass and velocity. | c. | mass and volume. | b. | weight and
velocity. | d. | weight and
volume. | | | | |
|
|
|
4.
|
An
example of an extensive physical property is a. | mass. | c. | color. | b. | density. | d. | boiling
point. | | | | |
|
|
|
5.
|
A
chemical change occurs when a. | dissolved minerals solidify to form a
crystal. | b. | ethanol is purified through
distillation. | c. | salt deposits form from evaporated sea
water. | d. | a leaf changes color. | | |
|
|
|
6.
|
A
physical change occurs when a a. | peach spoils. | c. | bracelet turns your wrist green. | b. | copper bowl
tarnishes. | d. | glue gun melts a
glue stick. | | | | |
|
|
|
7.
|
The
state of matter in which a material has definite shape and definite volume is the a. | liquid
state. | c. | gaseous
state. | b. | solid state. | d. | vaporous state. | | | | |
|
|
|
|
|
|
8.
|
The
homogeneous mixture in the illustration above is in container
|
|
|
9.
|
The
reason for organizing, analyzing, and classifying data is a. | so that
computers can be used. | b. | to prove a law. | c. | to find
relationships among the data. | d. | to separate qualitative and quantitative
data. | | |
|
|
|
10.
|
Which
of the following observations is quantitative? a. | The liquid turns blue litmus paper
red. | c. | The liquid
tastes bitter. | b. | The liquid boils at 100ºC. | d. | The liquid is cloudy. | | | | |
|
|
|
11.
|
A
theory is best described as a a. | series of experimental observations. | b. | generalization
that explains a body of known facts or phenomena. | c. | scientifically
proven fact. | d. | testable statement. | | |
|
|
|
12.
|
A
true statement about mass is that a. | mass is often measured with a spring
scale. | b. | mass is expressed in pounds. | c. | as the force of
Earth's gravity on an object increases, the object's mass increases. | d. | mass is
determined by comparing the mass of an object with a set of standard masses that are part of a
balance. | | |
|
|
|
13.
|
To
determine density, the quantities that must be measured are a. | mass and
weight. | c. | volume and
concentration. | b. | volume and weight. | d. | volume and mass. | | | | |
|
|
|
14.
|
The
density of aluminum is 2.70 g/cm3. The volume of a solid piece of aluminum is 1.50
cm3. Find its mass. a. | 1.50 g | c. | 2.70 g | b. | 1.80
g | d. | 4.05
g | | | | |
|
|
|
15.
|
The
density of pure diamond is 3.5 g/cm3. The mass of a diamond is 0.25 g. Find its
volume. a. | 0.071
cm3 | c. | 3.5
cm3 | b. | 0.875 cm3 | d. | 14 cm3 | | | | |
|
|
|
16.
|
0.25
g is equivalent to a. | 250 kg. | c. | 0.025 mg. | b. | 250
mg. | d. | 0.025
kg. | | | | |
|
|
|
17.
|
If 1
inch equals 2.54 cm, how many centimeters equal 1 yard? a. | 0.07
cm | c. | 36
cm | b. | 14.17
cm | d. | 91.4
cm | | | | |
|
|
|
18.
|
A
measurement is said to have good precision if it a. | agrees closely with an accepted
standard. | b. | agrees closely with other measurements of the same
quantity. | c. | has a small number of significant
figures. | d. | has a large number of significant
figures. | | |
|
|
|
19.
|
If
some measurements agree closely but differ widely from the actual value, these measurements
are a. | neither precise
nor accurate. | b. | accurate, but not precise. | c. | acceptable as a
new standard of accuracy. | d. | precise, but not accurate. | | |
|
|
|
20.
|
These
values were obtained as the mass of products from the same reaction: 8.83 g; 8.84 g; 8.82 g. The
known mass of products from that reaction is 8.60 g. The values are a. | accurate. | c. | both accurate
and precise. | b. | precise. | d. | neither accurate nor precise. | | | | |
|
|
|
Mass Data of
Sample | | | Trial 1 | Trial 2
| Trial 3 | Trial 4 | Student A | 1.43
g | 1.52 g | 1.47 g | 1.42
g | Student
B | 1.43 g | 1.40 g | 1.46
g | 1.44 g | Student C | 1.54
g | 1.56 g | 1.58 g | 1.50
g | Student
D | 0.86 g | 1.24 g | 1.52
g | 1.42 g | | | | | |
|
|
|
21.
|
Four
students each measured the mass of one 1.43 g sample four times. The results in the table above
indicate that the data collected by ____ reflect the greatest accuracy and
precision. |