Category : 1st Class
This lesson will help you to:
QUICK CONCEPT REVIEW
Have you ever wondered that if there was no clock, how would you know when to go to school or when to watch your favourite cartoon television?
A clock tells us time.
The numbers 1 to 12 are written on it.
It has two hands. The long hand is the minute hand. The short hand is the hour hand.
The place where numbers are written is called the dial of the clock. The hour hand moves from one number to the next in 1 hour.
DAY TIME AND NIGHT TIME
We do number of activities from morning to night.
When the sun rises, it is light and we are awake. It is daytime. We perform various activities in day time. For example we go to school, eat, play with our friends and study. When it is dark, it is night time. We sleep at night.
Real Life Example
Calendar helps us to keep record of important dates like birthday, holidays, summer vacations etc.
Clock helps us to set morning alarm for school and offices.
If someone asks you, what is the time? Then how will you answer? Let us understand
HOW TO READ TIME?
and if long hand is pointing at 12 and short hand is pointing at 6 than we say that time is 60' clock. You will learn more about reading time in higher classes.
MORE TIME-LESS TIME
Some activities take less time and some take more time to do. Let us understand with the help of some examples Example:
Activities which take less time
Activities which take more time
TYPES OF CLOCK IN USE
We use different types of clock:
Wall Clock: A wall clock is a clock mounted on the wall.
Alarm Clock: Alarm clock is used to set up the alarm.
Wrist Watch: A wrist watch is a watch that is worn on the wrist.
Digital Clock: A digital clock does not have hands and shows time in digits. These clocks use two sets of numbers separated by a colon to indicate the hour and minutes.
In ancient time, when there was no clock people kept track of time by the help of sun rise and sun set.
Have you ever wondered if there was no calendar, you would not be able to know in which month you birthday comes?
There are 7 days in a week.
After Sunday, we start with Monday again.
Do you know?
60 minutes make 1 hour.
24 hours make 1 day.
If today is Thursday than yesterday was Wednesday and tomorrow will be Friday.
MONTHS IN A YEAR
There are 12 months in a year.
Some months have 31 days.
Some months have 30 days.
February has 28 or 29 days. It is the only month that does not have 30 or 31 days.
In a year, there are 365 days. Each leap year has 366 days, when there are 29 days in the month of February.
Leap year comes after every 4 years!
Do you know?
The calendar which we are using currently is called Gregorian Calendar, before gregorian calendar, most of the countries relied on the Julian calendar. The Julian calendar creates an error of 1 day every 128 years.
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