By Cammie Goodman Icicles raindrops an invisible gas in the airthese are all forms of water Water can be a solid a liquid or a gas Water can also ID: 615803
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Slide1
Water: States of Matter
By: Cammie GoodmanSlide2
Icicles
, raindrops, an invisible gas in the air—these are all forms of water.
Water can be a
solid, a liquid, or a gas
.Water can also change from one of these forms to anotherSlide3
States of Matter
Matter
is anything that takes up
space
and has
weight
Exist in different physical forms, called
states. (solids, liquids,
gases)Slide4
A solid is matter that
keeps its own shape
. Slide5
A liquid is matter that
takes the shape of its
container. Slide6
A gas is matter that
spreads out
in all directions
.Slide7
Water
is a kind of matter that is found in nature in all three states
.
Earth’s water is found in the liquid state in
oceans, lakes, and rivers.
Frozen water or ice is in the
solid state
.
Frozen water is found in the
polar ice caps
and in large ice sheets called
glaciers
. Slide8
Water in its gas state is called
water vapor.
Water vapor is one of the
gasses
in the air. Slide9
Earth’s water changes
state: glaciers melt, dripping water forms icicles, puddles dry up and water vapor becomes drops of dew. Slide10
Melting
Melting is the change of matter from a
solid to a liquid
.
When enough
heat energy
is added to the solid ice cubes, they
melt
.
Heat makes the
particles
of frozen water
move faster and farther apart
. The solid becomes liquid water.
When
heat energy
is added to matter, it gets
hotter
. Its temperature
rises
.
Temperature
is a measure of how much
heat energy
and object has. Slide11
Evaporation
Evaporation is the change of matter from a
liquid to a gas
.
When a liquid changes to a gas, we say it
evaporates.
If you
heat
a pot of water on a stove, the water particles start to
move faster
, as they move
farther apart
.
When
the temperature of the water reaches
100
˚
C
, the water
boils
, or forms
bubbles of gas
. Slide12
Evaporation
Water does have to
boil to evaporate
. Evaporation can happen at
different temperatures, when water particles get enough heat energy. Then those particles leave the liquid water and go in the air as a gas—water vapor. Evaporation happens faster
when temperatures are
high
. When liquid water begins to boil at 100
˚
C, it evaporates
quickly.
Slide13
You
may see a cloud of “steam” rising from a pot of boiling water. What you see is not water vapor. Water vapor is a
clear, colorless gas
. The cloud is a
mist, made up of tiny droplets of liquid water that condense from water vapor. Slide14
Condensation
Condensation
is the change of matter from a
gas to a liquid
.
When a gas changes to a liquid, we say it
condenses
.
If it is a hot sunny day and you have a cold glass of water filled with ice cubes. You notice that drops of water
form on the outsid
e of the glass. The drops form as
water vapor in the air
condenses on the cold glass. Slide15
When water vapor
loses heat, its particles move more slowly. They move
closer
together. The water vapor changes
to liquid water. When liquid water gets cold enough, it freezes. Freezing is the change of matter from a liquid to a solid.
As liquid water
loses heat energy
, its particles move more
slowly.
If the water loses enough heat, it becomes a
solid—ice
.
Water freezes at
0
˚
CSlide16
Discussion Question:
When the air cools at night, the drops of water called dew form on the grass. How do the drops form? Why do they disappear during the
day?Slide17
Lesson Review
What is the change of gas to a liquid called
?
Evaporation
CondensationMeltingFreezingSlide18
2. Which
statement BEST describes what happens to water when it changes state from a liquid to a solid?
Its particles begin to move faster
Its particles do not move at all
Its particles evaporateIts particles move more slowly. Slide19
3. What
happens to water when it evaporates?
It becomes a solid
It becomes droplets
It is no longer matterIt becomes a gas. Slide20
4. What
happens to liquid water at 0˚C?
It becomes a solid
It becomes air
It does not changeIt becomes a gas.