Page 206 - New Medley 3 Semester 2

Di erent units of length are related to each other in the following way:

10 millimetres (mm) = 1 centimetre (cm)

100 centimetres (cm) = 1 metre (m)

1000 metres (m) = 1 kilometre (km)

MEASURING TIME

Can you imagine what would happen if there was nothing to tell you time? How

would you reach the school in time? When would you switch on your favourite
TV programme?

Can you name the instrument that tells you the

exact time?

Watches and clocks tell us the time in hours,
minutes and seconds. Do you know at what time

your school starts and gets over every day?

A larger duration of time is a day. ere are 24 A wristwatch A wall clock
hours in a day. 365 days together make a year.

Time in days, weeks and months can be seen Knowledge Zone
in calendars. Clock is an instrument which
shows time in a room or hang on
Units of Time the wall.

e standard unit of time is second. e other Watch is a type of small clock that
is worn on the wrist.

units are minute and hour. ese units are
related to each other in the following way:
60 seconds (s) = 1 minute (m)

60 minutes (m) = 1 hour (h)
1 • Critical Thinking

Write Yes or No
1. ere is no need to measure things correctly.

2. We measure grocery items by their weight.

3. A tailor uses a metre rod to measure cloth.

4. A day has 24 hours.

204