The Kinetic Theory of Matter
Practice Test
1.
The _______________ states that the submicroscopic particles of all matter are in constant, random motion.
a.
Brownian law
b.
molecular hypothesis
c.
kinetic theory
d.
atomic theory
2.
For most substances, which physical state has the highest density?
a.
solid
b.
gas
c.
liquid
d.
water
3.
A state of ___________ is reached in a sealed container that contains significant amounts of both a liquid substance and its vapor.
a.
Equilibruim
b.
reaction
c.
elevation
d.
freezing
4.
Gas particles _______________ kinetic energy when they collide with other particles or the walls of their container.
a.
gain much
b.
lose no
c.
gain some
d.
lose some
5.
According to the kinetic-molecular theory, which of these describes a gas?
a.
small particles far apart in uniform motion
b.
large particles in constant, random motion
c.
large particles far apart in uniform motion
d.
small particles in constant, random motion
6.
The pressure of a substance in equilibrium with its liquid is called its _________________.
a.
temperature
b.
freezing point
c.
vapor pressure
d.
rate
7.
A temperature of 0 K is known as _______________.
a.
the freezing point of air
b.
the melting point of water
c.
absolute zero
d.
0
o
C
8.
A solid that has no regular structure is said to be ____________.
a.
amorphous
b.
crystalline
c.
cubic
d.
hexagonal
9.
The motions of particles cause them to spread out in a process known as ____________.
a.
diffusion
b.
condensation
c.
aeration
d.
evaporation
10.
________________ is the reverse of evaporation.
a.
Boiling
b.
Melting
c.
Freezing
d.
Condensation
11.
Because liquid molecules are much closer than gas molecules, liquids are much less ____________ than gases.
a.
flexible
b.
lattice-like
c.
massive
d.
compressible
12.
Increasing a liquid's temperature causes its vapor pressure to ___________.
a.
remain constant
b.
change to solid
c.
increase
d.
decrease
13.
The constant, random motion of tiny chunks of matter is called _________________.
a.
parabolic trajectory
b.
linear motion
c.
kinetic motion
d.
Brownian motion
14.
Pressure is the __________ acting per unit area of a surface.
a.
force
b.
mass
c.
momentum
d.
velocity
15.
______________ is a model of gas behavior that is valid over a wide range of conditions.
a.
Pressure
b.
Volume
c.
An ideal gas
d.
The gas hypothesis
16.
At room temperature, gas particles move at roughly _____________ m/s.
a.
1 to 2
b.
0.1 to 0.5
c.
100 to 1000
d.
10 000
17.
______ K = 100
o
C.
a.
373
b.
100
c.
-460
d.
273
18.
___________ is the most common form of matter in the universe but the least common on Earth.
a.
Plasma
b.
Liquid
c.
Gas
d.
Solid
19.
At the same temperature, ethanol has _____________ vapor pressure than water.
a.
about the same
b.
a somewhat lower
c.
a much higher
d.
a much lower
20.
A _________ is a flowing, compressible state of matter that has no definitie shape or volume.
a.
gas
b.
plasmoid
c.
liquid
d.
solid
21.
When materials called _____________ melt, they lose their rigid organization in only one or two dimensions.
a.
liquid crystals
b.
solids
c.
solid crystals.
d.
liquids
22.
At the same temperature, a steam burn may be more severe than a water burn because of water's high _______________________.
a.
mass
b.
polarity
c.
density
d.
heat of vaporization
23.
The _____________ of a material is a measure of the average kinetic energy of its particles.
a.
mass
b.
volume
c.
temperature
d.
rigidity
24.
The temperature of a substance _________________ as its heat of fusion is added to melt it.
a.
decreases
b.
remains at 0 K
c.
increases rapidly
d.
remains relatively constant
25.
Which of the following is a vapor?
a.
oxygen
b.
steam
c.
helium
d.
hydrogen
