down comes the rain

8/9/2019 Down Comes the Rain

1/30

L

E

T

S

-

R

E

A

D

-

A

N

D

-

F

I

N

D

-

O

U

T

S

E

N

W

M

.

S

•

•

\

-

l

\

0


2/30


3/30


4/30

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 .


5/30

Water droplets ome f r o m wa te r vapor W ater va po r is a gas


6/30

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


7/30

.

C

O

-

4

c

«

c

o

<

o

o

f

0

^

Q

o

-

w

/

A

P

i

^

t

c

3

;

V

*

•

6

<

>


8/30

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.


9/30


10/30

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.


11/30

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


12/30

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


13/30

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

5


14/30

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


15/30


16/30


17/30

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 .


18/30

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


19/30


20/30

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

3

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.


21/30

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


22/30

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

o ° .

o

•

0

c •

Q

© - b0 °/v

o

i

G

Q

\

V

A

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 .


23/30

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

\

\

O.-O:©

U . 9 u

: O . Q . O G

O : , O ^ . - ; : ^

;

. Q ^ . ^ G

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


24/30


25/30


26/30


27/30

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 .


28/30


29/30

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. -

3


30/30

down comes the rain

Documents