Name ANSWER KEY The Three States of Matter and How They Change
1.
A solid is a state of matter with a fixed volume (size) and shape.
2.
Describe the arrangement and movement of particles in a solid.
The particles are close together in a regular pattern. They are
unable to move from place to place. They only vibrate.
3.
A liquid is a state of matter with a fixed volume, but no fixed shape
4.
Describe the arrangement and movement of particles in a liquid.
The particles are close together, but they can slide past each other
and move from place to place.
5.
A gas is a state of matter that has no fixed volume and no fixed
shape.
6.
Describe the arrangement and movement of particles in a gas.
The particles are very far apart and can move freely in any
direction.
7.
Freezing is the process of a liquid changing to a solid.
8.
Melting is the process of a solid turning into a liquid.
9.
Evaporation is the process of a liquid changing into a gas.
10.
Condensation is the process of a gas turning into a liquid.
11.
Sublimation is the process of a solid turning DIRECTLY into a gas.
12.
Describe what happens to the particles in ice as the ice melts.
The ice particles gain energy and move faster. They eventually
break loose from each other and are able to slide past one another.
13.
Describe what happens to water particles as liquid water
evaporates.
As the particles absorb heat, they move faster and break free from
the liquid.
14.
What is the difference between evaporation and boiling?
In evaporation, only the particles on the surface gain enough
energy to change into a gas. When boiling, the heating and
changing to a gas occur throughout the liquid and at a much
faster rate.
15.
What determines the state of matter that a substance can occur
in?
Any substance can exist in a solid, liquid, or gaseous state. The
state depends on the arrangement and movement of its particles
due to the amount of energy the particles have.
16.
Why is frozen Carbon Dioxide (CO2) called “dry” ice?
It is dry because it doesn’t melt into a wet liquid. Dry ice will
sublimate. The solid ice changes DIRECTLY into a gas.
Name _________________________ The Three States of Matter and How They Change
1.
A ________________ is a state of matter with a fixed volume (size)
and shape.
2.
Describe the arrangement and movement of particles in a solid.
3.
A ____________________ is a state of matter with a fixed volume, but
no fixed shape
4.
Describe the arrangement and movement of particles in a liquid.
5.
A _____________ is a state of matter that has no fixed volume and
no fixed shape.
6.
Describe the arrangement and movement of particles in a gas.
7.
_____________________ is the process of a liquid changing to a solid.
8.
Melting is _______________________________________________________
_________________________________________________________________.
9.
Evaporation is the process of a ___________________ changing into a
______________.
10.
_____________________________ is the process of a gas turning into a
__________________.
11.
________________________ is the process of a solid turning
DIRECTLY into a gas.
12.
Describe what happens to the particles in ice as the ice melts.
13.
Describe what happens to water particles as liquid water
evaporates.
14.
What is the difference between evaporation and boiling?
15.
What determines the state of matter that a substance can occur
in?
16.
Why is frozen Carbon Dioxide (CO2) called “dry” ice?
Name ANSWER KEY The Three States of Matter and How They Change
TEST
Matching
1.
___B___freezing
a.
the process of a solid
turning directly into a
gas.
2.
___E___condensation
b.
the process of a liquid
changing to a solid.
3.
___C___evaporation
c.
the process of a liquid
changing into a gas.
4.
___A___sublimation
d.
the process of a solid
changing to a liquid.
5.
___D___melting
e.
the process of a gas
changing into a liquid.
Tell whether the following statements describe a solid, a
liquid, or a gas.
6.
has NO fixed shape, but DOES have a fixed volume (size).
Liquid
7.
the particles are far apart and can move freely in any
direction.
Gas
8.
the particles are close together but CAN SLIDE past each
other.
Liquid
9.
has NO fixed shape and NO fixed volume.
Gas
10.
the particles are very close together and can NOT move
from place to place.
Solid
11.
has a fixed volume AND a fixed shape
Solid
True or False- If the statement is true, write true. If it is
false, CHANGE THE UNDERLINED WORD TO MAKE IT
TRUE.
12.
Boiling is a similar process to freezing but it happens
more quickly.
False- evaporation
13.
All substances can exist as a solid, liquid, or gas.
True
14.
Evaporation happens when the molecules in a liquid
move slower.
False- faster
15.
Melting occurs when the particles lose energy.
False- gain
Short Answer
16.
Explain why the grass is sometimes wet on a cold
morning (when it didn’t rain).
The cold slowed the movement of the molecules in
the water vapor and they condensed to form liquid
droplets on the cold surface of the grass.
17.
Why is frozen carbon dioxide (CO2) called dry ice?
It is dry because it doesn’t melt into a liquid. Dry ice
will sublimate. The solid ice changes DIRECTLY into
a gas.
18.
Why does your bike tire get harder as you pump more air
into it?
The gas particles in the air push out on the tire in all
directions because they have been squeezed or
compressed into a small area.
Bonus
Explain why LIQUID water is the only state of water that you
are able to swim and dive. Why can’t you swim in solid water
or water vapor. Be sure to explain the arrangement and
motion of the particles of each state.
Liquid have particles that are close together but can slide
past each other. This gives you enough material to slow
you down when you dive. It also allows you to push off of
those particles to swim.
A solid has enough close together particles, but they are
locked into position so you cannot pass through them.
A gas like air would let you pass through, but the particles
are too far apart. They wouldn’t slow you down when
diving and there isn’t enough to push off of for
swimming/flying (birds are so lucky!).
Name _________________________ The Three States of Matter and How They Change
TEST
Matching
1.
_______freezing
a.
the process of a solid
turning directly into a
gas.
2.
_______condensation
b.
the process of a liquid
changing to a solid.
3.
_______evaporation
c.
the process of a liquid
changing into a gas.
4.
_______sublimation
d.
the process of a solid
changing to a liquid.
5.
_______melting
e.
the process of a gas
changing into a liquid.
Tell whether the following statements describe a solid, a
liquid, or a gas.
6.
has NO fixed shape, but DOES have a fixed volume (size).
7.
the particles are far apart and can move freely in any
direction.
8.
the particles are close together but CAN SLIDE past each
other.
9.
has NO fixed shape and NO fixed volume.
10.
the particles are very close together and can NOT move
from place to place.
11.
has a fixed volume AND a fixed shape
True or False- If the statement is true, write true. If it is
false, CHANGE THE UNDERLINED WORD TO MAKE IT
TRUE.
12.
Boiling is a similar process to freezing but it happens
more quickly.
13.
All substances can exist as a solid, liquid, or gas.
14.
Evaporation happens when the molecules in a liquid
move slower.
15.
Melting occurs when the particles lose energy.
Short Answer
16.
Explain why the grass is sometimes wet on a cold
morning (when it didn’t rain).
17.
Why is frozen carbon dioxide (CO2) called dry ice?
18.
Why does your bike tire get harder as you pump more air
into it?
Bonus
Explain why LIQUID water is the only state of water that you
are able to swim and dive. Why can’t you swim in solid water
or water vapor. Be sure to explain the arrangement and
motion of the particles of each state.