Chapter 0 of 14

Tick-Tick-Tick (Time)

Tick-tick-tick goes the clock. Learning to READ TIME — hours, minutes, and seconds — using analog and digital clocks, and understanding AM/PM, days, months, and years. CBSE Class 4 Mathematics (Math-Magic) Chapter 4.

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Tick-Tick-Tick — Time

"Time is always moving. The clock helps us measure it."

1. What You Will Learn

Reading an ANALOG CLOCK (hour hand, minute hand, second hand)
Converting between hours, minutes, and seconds
Understanding AM and PM
Reading a CALENDAR
Calculating time DURATIONS

2. Reading a Clock

A clock has THREE hands:

HOUR HAND (short, thick): Shows the HOUR. Moves SLOWLY.
MINUTE HAND (long, thinner): Shows MINUTES. One full rotation = 60 minutes = 1 hour.
SECOND HAND (thin, fastest): Shows SECONDS. 60 seconds = 1 minute.

Reading the Time

The hour hand points to the hour number
The minute hand shows minutes past the hour
Example: Hour hand at 3, minute hand at 12 → 3:00 (Three o'clock)
Example: Hour hand between 3 and 4, minute hand at 6 → 3:30 (Half past three)

3. Time Conversions

Conversion	How
1 hour = 60 minutes	× 60
1 minute = 60 seconds	× 60
1 day = 24 hours
1 week = 7 days
1 year = 365 days (366 in leap year)
1 year = 12 months

AM and PM

AM (Ante Meridiem): Midnight to Noon (12:00 AM to 11:59 AM). MORNING.
PM (Post Meridiem): Noon to Midnight (12:00 PM to 11:59 PM). AFTERNOON and EVENING.

4. Calculating Duration

Riya wakes up at 6:30 AM and leaves for school at 7:45 AM. How much time does she have?

From 6:30 to 7:00 = 30 minutes
From 7:00 to 7:45 = 45 minutes
Total = 30 + 45 = 75 minutes = 1 hour 15 minutes

5. Practice Questions

How many minutes in 3 hours? (Answer: 180 minutes)
How many days in 4 weeks? (Answer: 28 days)
9:15 AM — is this morning or evening? (Answer: Morning)
A movie starts at 2:30 PM and ends at 5:00 PM. How long is it? (Answer: 2 hours 30 minutes)

6. Fun Activity

Make Your Own Timetable: Write down your daily schedule:

Wake up: _______
Breakfast: _______
School starts: _______
Lunch: _______
Play time: _______
Homework: _______
Dinner: _______
Bedtime: _______

How many hours do you spend at school? How many hours do you sleep?

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