Matter - Properties and Changes
Practice Test
1.
How many kilograms of lead are present in 426 pounds of lead? Each kilogram contains 2.20 pounds.
a.
937 kg
b.
193.6 kg
c.
194 kg
d.
937.2 kg
2.
A tentative explanation for a series of observations is a __________.
SC.H.1.4.3
a.
theory
b.
model
c.
hypothesis
d.
law
3.
What is the percent error if a measured value is 24.59 g/mL and the accepted value is 25.49 g/mL?
SC.H.1.4.1
a.
3.50%
b.
0.0366
c.
0.9647
d.
1.037
4.
Which of the following is a heterogeneous mixture?
SC.A.2.4.2
a.
sugar in water
b.
samples of nitrogen and oxygen in the same container
c.
sugar
d.
samples of argon and iron in the same container
5.
Which of the following is a compound?
SC.A.2.4.2
a.
steel
b.
water
c.
crude oil
d.
neon
6.
The statement, Mass can neither be created nor destroyed is the ____________.
SC.B.1.4.2
a.
law of gravity
b.
law of conservation of energy
c.
law of conservation of mass
d.
law of multiple proportions
7.
When an explanation has been supported by many experiments, the explanation is a __________.
a.
law
b.
hypothesis
c.
theory
d.
model
8.
What is the name given to research that is undertaken to solve a specific problem?
SC.H.3.4.6
a.
pure research
b.
applied research
c.
technology
d.
theoretical research
9.
How can you tell when the following reaction is balanced?
2Cu+O
2
→ 2CuO
SC.B.1.4.2
a.
volume of reactants = mass of products
b.
mass of the reactants = mass of products
c.
volume of reactants = volume of products
d.
mass of reactants = volume of products
10.
A material that cannot be broken down further by chemical means is a
n
________.
SC.A.2.4.2
a.
substance
b.
compound
c.
mixture
d.
element
11.
How is the slope of a linear graph calculated?
SC.H.3.4.3
a.
slope =
x
2
– x
1
/ 100
b.
slope =
y
2
– y
1
x 100
c.
slope =
x
2
– x
1
/
y
2
– y
1
d.
slope =
y
2
– y
1
/
x
2
– x
1
12.
Which of the following methods of separating mixtures is best if the solution cannot be saturated and is temperature-sensitive?
SC.A.1.4.1
a.
chromatography
b.
combustion
c.
crystallization
d.
distillation
13.
Dimensional analysis is a method of problem-solving that focuses on ________ .
SC.H.3.4.3
a.
precision
b.
accuracy
c.
error
d.
units
14.
Which of the following materials was discovered by chance during research on artificial fiber creation?
a.
nylon
b.
silk
c.
ozone
d.
lysozyme
15.
A form of matter that has a fixed shape and occupies a fixed volume is a _________.
SC.A.1.4.2
a.
liquid
b.
gas
c.
plasma
d.
solid
16.
What is the area in square millimeters of a rectangle that is 7.431 cm long and 23.33 mm wide?
SC.H.3.4.3
a.
17.34 mm
2
b.
1734 mm
2
c.
1.734 mm
2
d.
173.4 mm
2
17.
In the SI system of measurement, there are seven ________ units.
a.
metric
b.
derived
c.
English
d.
base
18.
How many significant figures will there be when the density value is calculated from the following data? mass = 24.47g; volume =13.2 mL
a.
3
b.
5
c.
2
d.
4
19.
The representation of data on graph that resembles a pizza is a _________.
SC.H.3.4.1
a.
bar graph
b.
inverse
c.
circle graph
d.
line graph
20.
Seawater is not a substance because __________.
a.
it is salty
b.
it is a liquid
c.
it has hydrogen as part of its composition
d.
its composition may be different from sample to sample
