Tik Tik Tik
NCERT book Page No: 36
Three friends read time from a clock. Who is right?
In the first clock, the hour hand is at 3 and the minute hand is at 12. This means it is 3 O’clock. Here Pinki is right
In the second clock, the hour hand has passed 5 and the minute hand is at 7. So, the time is 5: 35. Pinki is right.
In the third clock, the hour hand is at 7 and the minute hand is at 3. Hence, the time is 7: 15. Once again Pinki is right.
NCERT book Page No: 37
Show the following times in the clock:
Do you like sky watching? If yes, then this one should interest you:
(a) At what time does the sun rise at your place?
(b) When does the sun set?
(c) Does the sun rise and set at the same times every day?
(a) The Sun rises at 6: 00 a.m. at my place.
(b) The Sun sets at 6: 30 p.m. at my place.
(c) No, the Sun does not rise and set at the same times every day.
NCERT book Page No: 38
How long will it take the minute hand to move from
NCERT book Page No: 39
Draw where the hands will be:
How long does your school assembly take?
Our school assembly takes 30 minutes
How long is your lunch break?
In our school, the lunch break is 1 hour long.
How long is your games period?
The games period in our school is 40 minutes long
Is it the same as all the other periods?
Yes, all the other periods are the same.
The games period and lunch break seem very short! Aren’t they?
No, the time period is enough to play and have lunch.
NCERT book Page No: 40
How many minutes can these activities take? Make a guess and then check at home.
* Boiling of 1 litre milk takes about 6 minutes
* Filling a bucket takes about 3 minutes
* Sweeping the room takes about 6 minutes
In one minute, how many times can you –
(a) Snap your finger ____________
(b) Skip a rope ____________
(c) Jump up and down ____________
(d) ___________ _____________
Write more such fun activities in this column
(a) Snap your finger 10 times
(b) Skip a rope 35 times
(c) Jump up and down 45 times
(d) Blinking of eyelids 50 times
Here is another challenge for you. How long can you _________
(a) Speak non stop ______________
(b) Stand on one leg ______________
(c) Sing ‘Aaa…… without a break ______________
(a) Speak non stop 5 minutes
(b) Stand on one leg 3 minutes
(c) Sing ‘Aaaa…. without a break 2 minutes
How long do you take to –
(a) Run a 50 metre race ___________
(b) Collect 50 pebbles from the ground ____________
(c) Count 1 to 100 ____________
(a) Run a 50 metre race 5 minutes
(b) Collect 50 pebbles from the ground 3 minutes
(c) Count 1 to 100 1 minute
NCERT book Page No: 41
Let’s look at a clock again! Solve this one –
(a) The minute hand started from ‘2’. How many minutes will it take to come back to ‘2’ again?
(b) What happens to the hour hand? Does it also move? How long will it take to move from one number to the next?
(c) Look around you and list the activities that take about one hour to complete.
(a) The minute hand takes 60 minutes to come back to 2 again.
(b) Yes, the hour hand also moves. The hour hand takes 1 hour to move from one number to the next number.
(c) Following are the list of activities that takes one hour to complete
1. Cooking food
2. Watching news
3. Getting ready for function
4. Completing homework
5. Playing football
How long does it take to cook dinner at home? More than an hour / less than an hour
Cooking dinner takes more than an hour at home.
Ask your father if he can cook as fast as your mother does. Yes / No
Which games take less than an hour to finish?
Games take less than an hour to finish are long jump, high jump, snake and ladder etc.
How long does a football match take?
Time duration of a football match is 90 minutes.
NCERT book Page No: 43
Mark these in the correct order on Muniya’s Time Line.
The correct order on Muniya’s Time Line is given below
Muniya got her first tooth in September. How many months old was she then? How many months have passed from March to September?
Muniya was born on 5/03/05 and on 15/09/05 she got her first tooth. So, there are 10 more days for 15/09/05. Therefore, Muniya was 6 months 11 days old when she got her first tooth. From March to September, six months have passed.
How old was Muniya, when
(a) she first sat up?
(b) she got her first tooth?
(a) Muniya was 8 months and 6 days old when she sat up first time.
(b) Muniya was 6 months and 11 days old when she got her first tooth.
What did she do first –
1. Walking / eating a banana?
2. Crawling / standing?
1. She ate banana first
2. She started crawling first
NCERT book Page No: 44
Now make a time-line of this dog’s life in your notebook.
Time line of a dog’s life is given as follows:
|After 2 weeks||After 3 weeks||After 4 weeks||In 7 months||After 1 year|
|Born||It opened its eyes||It got its first teeth and started eating||It started walking around but was still wobbling||It got full set of teeth||It was grown up dog and got its own puppies|
Note the differences between Muniya and Rani’s puppy:
The difference between Muniya and Rani’s puppy is as follows:
|Actions||Muniya (age)||Rani’s puppy (age)|
|Started walking||After 11 months of her birth||After 1 month of its birth|
|Ate food for the first time||6 months after her birth||After 3 weeks of its birth|
|Got the first tooth||6 months after her birth||After 3 weeks of its birth|
NCERT book Page No: 45
Do all animals grow at the same speed?
No, the growth of all the animals are not same.
Discuss about the growth of –
1. A hen
2. A cow
3. A bird
The animals given above grow in the following order:
A bird, a hen and a cow
Here are the pictures of grandfathers posing for a photograph. Who looks the oldest to you?
(a) How much older is Appu’s grandfather than Rani’s grandfather?
(b) Will Chuchoo’s grandfather ever grow as old as Appu’s grandfather?
(c) How much younger is Chuchoo rat’s grandfather than Rani’s grandfather?
(a) Elephant’s Appu’s grandfather age = 95 years old
Rani’s grandfather age = 70 years old
Difference between their ages = 95 – 70
= 25 years
Hence, Appu’s grandfather is older than Rani’s grandfather.
(c) Chuchoo rat’s grandfather age = 2 years old
Rani’s grandfather age = 70 years old
Difference in their age = 70 – 2
= 68 years old
Therefore, Chuchoo rat’s grandfather is 68 years younger than Rani’s grandfather
NCERT book Page No: 46
Now write which dates these stand for-
5/5/06 5 May 2006
5/5/06 5 May 2006
20/5/06 20 May 2006
7/6/06 7 June 2006
1/1/07 1 Jan 2007
Write these dates in numbers.
1 June 2006 ______________
30 May 2006 ______________
10 August 2007 ______________
1 June 2006 1/6/06
30 May 2006 30/5/06
10 August 2007 10/8/07
How long did it take the letter to reach from Ajmer to Nagpur?
From Ajmer, Atif wrote the letter on 1/5/06. Shobhna got the letter on 6/5/06 in Nagpur. So, the letter took 5 days to reach from Ajmer to Nagpur.
How many days will Atif spend at his Nani’s place?
On 5/5/06, Atif went to his Nani’s place.
On 20/5/06 he returned back from there
Therefore, he spent 15 days at his Nani’s place
Fill in the table:
|Dates||Number of days|
|Shabana’s holidays||1st June 2006||10th August 2006||70 days|
|Atif’s holidays||1st May 2006||30th June 2006||60 days|
Who has got longer holidays – Shabana or Atif?
Shabana got 70 days holidays in her school while Atif got 60 days holidays in his school. Hence, Shabana got longer holidays than Atif.
Which long holidays do you get in school? Fill the table.
The given holidays start and end on the dates given below
|Occasion||Dates||Number of days|
|Summer holidaysAutumn BreakWinter BreakHolidays after the exam||1st April11 October25 December5th March||1st June19 October10 January2nd April||60 days9 days17 days29 days|
NCERT book Page No: 48
(a) In which month was the butter packed?
The butter was packed on 15th January 2006.
(b) Which month will it be 180 days after 15/01/06?
Let us calculate 180 days from the date of manufacture.
Days in January = 17 days
In February = 28 days
In March = 31 days
In April = 30 days
In May = 31 days
In June = 30 days
Total days = 17 + 28 + 31 + 30 + 31 + 30 = 167 days
Remaining days = 180 – 167 = 13 days
Hence, the date will be 13th July 2006
(c) Can Chandran eat it on 15th May 2006?
Yes, he can eat it on 15th May 2006
Which are the other things that come with an expiry date?
Every products comes with an expiry date. Cold drinks, medicines, biscuits, sweets etc., have an expiry date.
What month and year is written as 07/05? Would it be safe to take the cough syrup in September 2005?
The month and year is written as 07/05 which shows that it is July 2005. No it is not safe to take the cough syrup in September 2005 as the expiry date is till July 2005 only.
NCERT book Page No: 49
Can you guess why they missed the train?
Railway uses 24 hours clock time. The ticket shows the time as 5: 30 means the train was in the morning and they reached at 5: 15 in the evening. If it was in the evening they would have written as 17: 30. Hence, they missed the train.
NCERT book Page No: 50
Look at this chart. It tells the difference between your watch and a 24 hour clock. Try to complete it.
|Time by your watch (12- hour clock)||Time by a 24-hour clock|
|1 O’ clock in the afternoon||13: 00 hours|
|2 O’ clock in the afternoon||14: 00 hours|
|3 O’ clock in the afternoon||15: 00 hours|
|3: 30 in the afternoon||15: 30 hours|
|6 O’ clock in the evening||18: 00 hours|
|9 O’ clock in the evening||21: 00 hours|
|12 O’ clock at midnight||24: 00 hours|
NCERT book Page No: 51
Now can you tell why a 24-hour clock is called so?
We know that there are 24 hours in a day. So, the 24 hours clock shows the time for the entire day. Therefore it is called as 24 hour clock.
Suppose a train leaves at 8: 30 at night. The time written on the Railway ticket would be
The time written on the Railway ticket would be 20: 30
You must have noted the time of sunrise and sunset. Write here using am and pm.
The time of sunrise and sunset on the 1st June
|Time of Sunrise||6: 00 am|
|Time of Sunset||6: 30 pm|
Where have you seen a 24-hour clock being used?
24-hour clock is used in
1. Railway station
3. Bus stand