down comes the rain
TRANSCRIPT
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L
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A l l
c l o u d s — b i g
ones
an d
l i t t l e ones gray ones
a n d w h i t e
ones—are
made o f b i l l i o n s o f
t i n y
drop s of wa ter . The drops
a r e c a l l e d d r o p l e t s
because
t he y are so sm al l .
6
t h is i s t he size o f a drop of wat e r
a d r o p l e t w o u l d b e j u s t a
t i n y speck
even
s m a l l e r t h a n t h i s o n e .
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Water droplets ome f r o m wa te r vapor W ater va po r is a gas
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W ater vap or is made wh en w ater evaporates Th at
me ns the wa ter
ch nges f rom
a
l i q u i d
to a gas
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.
C
O
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4
c
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c
o
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o
o
f
0
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Q
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w
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A
P
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t
c
3
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V
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<
>
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M o s t o f t h e w a t e r v a p o r i n t h e a i r comes
f r o m lakes r i ve rs an d oceans. I t comes f r o m
th e
leaves
o f p l a n t s a n d f r o m th e we t g roun d.
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When you breathe out you pu t w ater vapor into
th e air. U sually yo u can no t see the w ate r vapor.
B u t i t is the re.
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W h e n cows horses dogs and cats breathe out
th e y p u t w a te r v a p o r i n t o the air too. On a cold day
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You can make water vapor change to water
a Lot oyC
e
nto a gLass of
water.
As the 9 [ 0 ^
/ a e t s c ol d er th
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ometimes
th e glass stays d r y T h a t means there
is not mu ch water va por i n the air
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The air holds the wa ter vapor reezes c a r r y i t f rom one
place to another
M u c h
o f the vapor
moves
up an d away
f r o m
the
e ar t h
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A
s ingle dr op let is so sm all yo u canno t see
i t .
B u t
yo u can see a c lou d. That s
bec use
there are m i l l i o n s
and
m i l l i o n s
an d
m i l li o n s
o f water droplets in a c loud.
f u l l
o f t h e m .
^ V \ e > /
f a l l
t h r o u g h t r j
a n d
S p l a t t e r on { f
g r o u n d .
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2
om tim s
th e re are on ly a fe w sm al l ra i n dro ps
t h a t f a l l
s lowly I t i s dr i zz l i n g
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Som etim es the drop s i n c louds
freeze These
ra i ndrop s become
ice drops. This can happen even
on
a hot summer day.
f p f f f B t 9 J L
^ p l a n e s
^ V > e n i g g e r
K M c L o u d j
e
colder
t h e y
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That s
because
the c louds and water droplets are
h i g h above the earth .
M a n y c louds are so high that i t is freezing cold.
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drops
freeze change to
droos
Th«
i n t o ice.
drops
The
t h
L I
S t a r t
t o t a L L .
always f a L L
0
v A o? t h e c L o u d .
- f
n s t e a d a
t h e v m a y
c
a r r i e ^
u j f w a j r d b y
q i
>^ w a r c i
t V \ f t t m o v i n g a w a y
r o w
t h e
e a r t h
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A s th ey ar e c a r r ied u pw a r d , mo r e w a ter
collects
on
the t i n y bi ts o f ice . W hen th at w ater freezes, the drops
o f
ice
have
another layer o n the m .
0 / J
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o
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c •
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o
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O c a
i The ice dro ps are no w heavier, so once m ore they
fal l
/ to w a r d th e ea r th . B u t a i r m o v in g away f r o m the earth
m ay c arr y the ice drops up w ard again . Higher and higher
they go, and another layer of ice freezes o n to th em .
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P . O . : © V \
° 0
^ c c © °
The ice drops get heavier a n d heavier.
They
get so
heavy
t h a t t h e a i r c a n n o l o n g e r c a r r y t h e m u p w a r d
4
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: O . Q . O G
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So the ice drop s f a l l t o t h e e a r t h
I t is r a i n i n g i ce
O
t
. o
• o
5
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evaporates
f r om
lakes
r i ve rs
and oceans.
9 ..
<
evaporates
f r om
the
leaves
of
p l an t s
and
f r om
the
wet
g round .
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W hen the w ater vapo r cools i t condenses
The water vapor changes to wa ter droplets
and a l l together the dro plets m ake clouds.
Water droplets
j o i n
together to make water
drops. The drops
f a l l
to the earth
f r o m
the clouds.
. j iV-j ir. -
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