Introduction to Chemistry
Practice Test
1.
The general term for a systematic approach used in scientific study is _______________.
SC.H.1.4.1
a.
the scientific method
b.
quantitative analysis
c.
the scientific controversy
d.
qualitative analysis
2.
A ________ can be used to help visualize microscopic structures and events.
a.
hypothesis
b.
theory
c.
model
d.
variable
3.
When an explanation has been supported by many experiments, the explanation is a __________.
a.
law
b.
model
c.
hypothesis
d.
theory
4.
Which of the following releases matter?
SC.B.2.4.1
a.
turbines spinning in a power plant
b.
picking up iron filings with a magnet
c.
turning on an electric hot plate
d.
engaging a car exhaust system
5.
The variable that you plan to change during the course of an experiment is ___________.
SC.H.2.4.2
a.
the independent variable
b.
the dependent variable
c.
a control
d.
a constant
6.
Chemists who study the chemistry of living organisms work in the field of ______________.
a.
organic chemistry
b.
analytical chemistry
c.
physical chemistry
d.
biochemistry
7.
What is the measurement of matter whose value depends on the force of gravity?
a.
mass
b.
volume
c.
weight
d.
energy
8.
A branch of chemistry that is concerned with how and why chemicals interact is ______________.
a.
physical chemistry
b.
analytical chemistry
c.
theoretical chemistry
d.
biochemistry
9.
The type of data that is descriptive in nature is ___________.
SC.H.1.4.1
a.
random data
b.
quantitative data
c.
qualitative data
d.
hypothetical data
10.
A judgment based upon the results of an experiment is a _____________.
SC.H.1.4.1
a.
conclusion
b.
hypothesis
c.
variable
d.
theory
11.
A tentative explanation for a series of observations is a __________.
SC.H.1.4.3
a.
hypothesis
b.
theory
c.
model
d.
law
12.
A hypothesis is more likely to become a __________ because __________.
SC.H.1.4.1
a.
theory, fewer experiments are needed in order to support it
b.
theory, scientific laws are conclusions reached by many scientists about relationships in nature
c.
scientific law; fewer trials are needed during the experimental phase
d.
scientific law; theories are conclusions reached by many scientists about relationships in nature
13.
Chemists whose specialty is determining the composition of chemicals work in the field of ________.
a.
inorganic chemistry
b.
organic chemistry
c.
physical chemistry
d.
analytical chemistry
14.
Why can an object's weight vary with location but its mass cannot?
a.
Mass is a measure of the amount of matter in an object; weight is not.
b.
Determinations of mass account for varying gravitational pulls in different locations.
c.
Systems of measurement vary with location.
d.
Weight is a measure of both mass and the effect of Earth's gravitational pull on the matter. Mass measures only the amount of matter.
15.
Anything that has mass and takes up space is _________.
SC.B.2.4.1
a.
weight
b.
pressure
c.
matter
d.
volume
16.
Suppose that you experimentally determine the mass of nylon formed as a result of each of several similar chemical processes. What are the measurements of mass called?
a.
controls
b.
qualitative data
c.
independent variables
d.
quantitative data
17.
What branch of chemistry is most concerned with the study of carbon compounds?
a.
organic chemistry
b.
inorganic chemistry
c.
physical chemistry
d.
analytical chemistry
18.
What is the name given to a set of controlled observations that test a proposed explanation?
SC.H.2.4.2
a.
conclusion
b.
experiment
c.
hypothesis
d.
theory
