Page 12 - COMPOSITION AND PROPERTIES OF AIR

2. Air has mass.

o
w
v
e

o has
mas
. H
s
er
s
he mas
of
.
air
e do not
, w

eel t
f
A
als
• •Air also has mass. However, we do not feel the mass of air.
ir
hen w

w
e t
ie a balloon on eac
h end of
or
F
ic
t
• •For example, when we tie a balloon on each end of the stick
e
k
xample,
t
he s
with the help of strings. On pricking one balloon, the balloon
w it h t he help of s t r ings . O n pr ic king one balloon, t he balloon
bur s t s , r eleas ing t he air . T he end of t he s t ic k t ha t holds t he
bursts, releasing the air. The end of the stick that holds the
punctured balloon goes up and the other end that holds the
punct ur ed balloon goes up and t he ot her end t ha t holds t he
is
blown balloon comes down. This is because the blown
his
blo
becaus
blo
w
n
e
t
he
do
n. T
w
w
balloon comes
n
T
mas
.
has
his

cont
ains

t
s
air
ha
, t
ha
balloon contains air. This shows that air has mass, that
w
t
s

balloon
s

ho
air
t
he
blo
es

t
ier
balloon.
v
makes the blown balloon heavier than the punctured balloon.
han t
he
mak
punct
balloon hea
n
w
ed
ur
t