Page 16 - Science Class 6 Times Publication
P. 16
Activity 1.7
Measure the volume of a gas present in the balloon.
Take a water trough and ll water up to its two-thirds. Then ll a
measuring cylinder completely with water and place palm over it.
Invert the cylinder in the water trough and remove your palm slowly.
Now, dip the balloon inside the water trough and open the mouth of
the balloon to let air enter the measuring cylinder. The air released
from the balloon occupies some space inside the measuring cylinder.
This makes the water level fall down in the measuring cylinder. The
volume of the space occupied by the air inside the measuring cylinder
gives the volume of gas.
Measurement of time
The interval between any two events called time. The time is measured
with the help of watches and clocks. The basic unit of time is second
and the other units are minute, hour, day, week, etc .
60 seconds = 1 minute
60 minutes = 1 hour
24 hours = 1 day
7 days = 1 week
52 weeks = 1 year
365 days = 1 year
There are 366 days in a leap year. The year in which the month
February is of 29 days is called leap year.
Times' Crucial Science and Environment 12 Book 6
