Solids, Liquids, and Gases
Practice Test
1.
An object weighing 50 kg is floating in a fluid. What is the buoyant force of the fluid on the object?
a.
> 50 kg
b.
< 50 kg
c.
Not enough information is given.
d.
50 kg
Hint
2.
Pressure is defined as __________ .
a.
P1 = P2
b.
area/force
c.
force/area
d.
mass/acceleration
Hint
3.
Which of the following best describes particles in a solid?
a.
no attractive forces between particles
b.
particles tightly packed together
c.
fills whatever container it is in
d.
molecules slide past each other; sample takes shape of container
Hint
4.
What is the most common state of matter in the universe?
a.
solid
b.
gas
c.
plasma
d.
liquid
Hint
5.
Why can people on one side of a room smell the scent of an air freshener sprayed on the opposite side?
a.
The molecules of air freshener are amorphous.
b.
The molecules of air freshener have thermally expanded.
c.
The molecules of air freshener have diffused.
d.
The air pressure where the freshener was sprayed is greater than in the rest of the room.
Hint
6.
A fluid's resistance to flow is its __________ .
a.
viscosity
b.
buoyancy
c.
density
d.
pressure
Hint
7.
__________ is an increase in the size of a substance when the temperature is increased.
a.
Buoyancy
b.
Kinetic fusion
c.
Thermal expansion
d.
Diffusion
Hint
8.
According to Pascal, pressure applied to a fluid __________ .
a.
increases as it moves through the fluid
b.
decreases as it moves through the fluid
c.
fluctuates as it is transmitted throughout the fluid
d.
is transmitted unchanged throughout the fluid
Hint
9.
__________ is the ability of a fluid to exert an upward force on an object immersed in it.
a.
Viscosity
b.
Thermal expansion
c.
Buoyancy
d.
Vaporization
Hint
10.
When the temperature of a substance is lowered, its particles __________ .
a.
stop vibrating completely
b.
vibrate more slowly
c.
escape the attractive forces of the other particles
d.
vibrate more quickly
Hint
11.
According to the kinetic theory, all matter is composed of __________.
a.
particles
b.
waves
c.
solid material
d.
plasma
Hint
12.
__________ is the energy an object has due to its motion.
a.
Heat of vaporization
b.
Kinetic energy
c.
Diffusion
d.
Heat of fusion
Hint
13.
The energy required to change a liquid to a gas is __________.
a.
heat of fusion
b.
boiling point
c.
heat of vaporization
d.
heat of sublimation
Hint
14.
Bernoulli's principle states that as the velocity of a fluid __________, the pressure exerted by the fluid __________ .
a.
decreases; decreases
b.
increases; increases
c.
decreases; increases
d.
increases; decreases
Hint
15.
According to Boyle's law, at a constant temperature, if the volume of a container of gas is __________, then pressure of the gas will __________ .
a.
decreased; decrease
b.
decreased; increase
c.
increased; decrease
d.
increased; increase
Hint
16.
The supporting force exerted by a fluid on an object immersed in it is called __________ .
a.
viscosity
b.
density
c.
lift
d.
buoyant force
Hint
17.
The __________ of a substance is the temperature at which a solid begins to liquefy.
a.
heat of vaporization
b.
heat of fusion
c.
melting point
d.
boiling point
Hint
18.
Which of the following is a state of matter?
a.
particle
b.
plasma
c.
thermal
d.
diffuse
Hint
19.
What causes a balloon to remain inflated?
a.
The walls of the balloon gradually compress the gas inside.
b.
Air particles collide with the walls of the balloon.
c.
Air particles continue to enter through the balloon's walls.
d.
The temperature of the air inside the balloon gradually decreases.
Hint
20.
The SI unit of pressure is __________ .
a.
pascal
b.
charles
c.
bernoulli
d.
boyle
Hint
