Page 134 - Maths Class 05

7 Time

Looking Back

Time can be defined as the ongoing and continuous sequence of events that occur in
succession, from the past through the present to the future.
Time is used to quantify, measure or compare the duration of events or the intervals

between them, and even, sequence events.

We measure time in seconds, minutes, hours, days, weeks, months and years with clocks
and calenders.
A day has 24 hours. We use A.M to tell time running from midnight to noon and P.M. for

time running from noon to midnight.

AM PM

Midnight Noon (Mid Day) Midnight

12:00 2:00 4:00 6:00 8:00 10:00 12:00 2:00 4:00 6:00 8:00 10:00 12:00
AM AM AM AM AM AM PM PM PM PM PM PM AM

24 hours or
12 hours 12 hours
+ = 1 day
(Before noon) (After noon)
We measure and define what time of the day it is using a clock. A clock, in general, has 12
numbers written on it, from 1 to 12. It has an hour hand and a minute hand. The time is

usually based on 12-hour clock.

The hour hand, the shorter of the two hands, completes 1 rotation (360°) in 12 hours in a
normal 12-hour analogue. The minute hand, the longer hand, completes 1 rotation
through 360° in 60 minutes.

Here’s how the minute hand’s movement shows different time in an hour.

Minute Hour Minute Minute Hour

Hour

quarter past half past quarter to

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