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 Page 1


A I R , W A T E R
A N D
W E A T H E R
Page 2


A I R , W A T E R
A N D
W E A T H E R
WHAT IS WEATHER?
W e a t h e r i s t h e c o n d i t i o n o f t h e
a t m o s p h e r e a t a p a r t i c u l a r p l a c e
a n d t i m e . I t d e s c r i b e s w h e t h e r t h e
a t m o s p h e r e i s h o t o r c o l d , w e t o r
d r y , c a l m o r s t o r m y , c l e a r o r c l o u d y ,
w i n d y o r s t i l l .
Page 3


A I R , W A T E R
A N D
W E A T H E R
WHAT IS WEATHER?
W e a t h e r i s t h e c o n d i t i o n o f t h e
a t m o s p h e r e a t a p a r t i c u l a r p l a c e
a n d t i m e . I t d e s c r i b e s w h e t h e r t h e
a t m o s p h e r e i s h o t o r c o l d , w e t o r
d r y , c a l m o r s t o r m y , c l e a r o r c l o u d y ,
w i n d y o r s t i l l .
S U N
T h e s u n c a u s e s c h a n g e s i n
t h e w e a t h e r .
T h e E a r t h m o v e s o n i t s o w n
a x i s . T h i s m o v e m e n t i s c a l l e d
r o t a t i o n .
R o t a t i o n o f t h e E a r t h c a u s e s
d a y a n d n i g h t . 
M o r n i n g s a n d e v e n i n g s a r e
c o o l e r t h a n n o o n t i m e
Page 4


A I R , W A T E R
A N D
W E A T H E R
WHAT IS WEATHER?
W e a t h e r i s t h e c o n d i t i o n o f t h e
a t m o s p h e r e a t a p a r t i c u l a r p l a c e
a n d t i m e . I t d e s c r i b e s w h e t h e r t h e
a t m o s p h e r e i s h o t o r c o l d , w e t o r
d r y , c a l m o r s t o r m y , c l e a r o r c l o u d y ,
w i n d y o r s t i l l .
S U N
T h e s u n c a u s e s c h a n g e s i n
t h e w e a t h e r .
T h e E a r t h m o v e s o n i t s o w n
a x i s . T h i s m o v e m e n t i s c a l l e d
r o t a t i o n .
R o t a t i o n o f t h e E a r t h c a u s e s
d a y a n d n i g h t . 
M o r n i n g s a n d e v e n i n g s a r e
c o o l e r t h a n n o o n t i m e
S U N
T h e E a r t h a l s o m o v e s a r o u n d t h e s u n i n i t s o w n
o r b i t . T h i s m o v e m e n t i s c a l l e d r e v o l u t i o n .
R e v o l u t i o n o f t h e E a r t h c a u s e s c h a n g e s i n s e a s o n s .
Page 5


A I R , W A T E R
A N D
W E A T H E R
WHAT IS WEATHER?
W e a t h e r i s t h e c o n d i t i o n o f t h e
a t m o s p h e r e a t a p a r t i c u l a r p l a c e
a n d t i m e . I t d e s c r i b e s w h e t h e r t h e
a t m o s p h e r e i s h o t o r c o l d , w e t o r
d r y , c a l m o r s t o r m y , c l e a r o r c l o u d y ,
w i n d y o r s t i l l .
S U N
T h e s u n c a u s e s c h a n g e s i n
t h e w e a t h e r .
T h e E a r t h m o v e s o n i t s o w n
a x i s . T h i s m o v e m e n t i s c a l l e d
r o t a t i o n .
R o t a t i o n o f t h e E a r t h c a u s e s
d a y a n d n i g h t . 
M o r n i n g s a n d e v e n i n g s a r e
c o o l e r t h a n n o o n t i m e
S U N
T h e E a r t h a l s o m o v e s a r o u n d t h e s u n i n i t s o w n
o r b i t . T h i s m o v e m e n t i s c a l l e d r e v o l u t i o n .
R e v o l u t i o n o f t h e E a r t h c a u s e s c h a n g e s i n s e a s o n s .
T h e s u n h e a t s u p t h e w a t e r a n d c h a n g e s i t i n t o
w a t e r v a p o u r . T h e a m o u n t o f w a t e r v a p o u r
p r e s e n t i n t h e a i r i s c a l l e d h u m i d i t y . 
T h e w a t e r v a p o u r r i s e s u p a n d c o n d e n s e s t o
f o r m t i n y d r o p l e t s o f w a t e r . T i n y d r o p l e t s j o i n
t o g e t h e r t o f o r m c l o u d s . 
W h e n t h e c l o u d s b e c o m e t o o h e a v y , t h e n t h e
d r o p l e t s o f w a t e r f a l l a s r a i n . 
T h u s , s u n c h a n g e s s t a t e s o f w a t e r a n d c a u s e s
h u m i d i t y a n d r a i n .
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