krit.club logo

Time Goes On - Sequence of Events

Grade 3CBSE

Review the key concepts, formulae, and examples before starting your quiz.

🔑Concepts

Understanding Duration: Activities take different amounts of time to complete. Some take seconds (like blinking or snapping fingers), some take minutes (like brushing teeth or eating an apple), and some take hours (like watching a movie or sleeping). Imagine a 'Time Scale' where a second is a tiny dot and a year is a very long line.

The Sequence of Events: This means arranging activities in the order they happen from first to last. We use words like 'before', 'after', 'first', 'then', and 'finally'. Visualise a staircase where the bottom step is the start of your day and the top step is the end of your day.

Clock Basics: A clock face is a circle numbered from 11 to 1212. It has two main hands: a short 'Hour Hand' and a long 'Minute Hand'. When the minute hand points to 1212, the hour hand tells us the exact hour. For example, if the short hand is at 33 and the long hand is at 1212, the time is 3:003:00 or 33 o'clock.

Units of Time: Time is measured in different units that fit into each other. 6060 seconds make 11 minute, and 6060 minutes make 11 hour. Think of these like nested boxes where the small 'seconds' box fits into the 'minutes' box, which fits into the 'hours' box.

The Calendar: A calendar shows the days of the week and the months of the year. There are 77 days in a week and 1212 months in a year. Visualise a calendar as a large grid where each row represents one week and each box represents one day.

AM and PM: A full day has 2424 hours, divided into two 1212-hour periods. 'AM' (Ante Meridiem) is the time from midnight until just before noon (morning). 'PM' (Post Meridiem) is the time from noon until just before midnight (afternoon and night). Imagine a sun icon for AM and a moon icon for PM.

Seasons and Years: A year is the time it takes for the Earth to go around the Sun once, usually 365365 days. Within a year, we experience different seasons like Summer, Winter, and Monsoon. Picture a cycle or a wheel that repeats every 1212 months.

📐Formulae

1 minute=60 seconds1 \text{ minute} = 60 \text{ seconds}

1 hour=60 minutes1 \text{ hour} = 60 \text{ minutes}

1 day=24 hours1 \text{ day} = 24 \text{ hours}

1 week=7 days1 \text{ week} = 7 \text{ days}

1 year=12 months1 \text{ year} = 12 \text{ months}

1 ordinary year=365 days1 \text{ ordinary year} = 365 \text{ days}

1 leap year=366 days1 \text{ leap year} = 366 \text{ days}

💡Examples

Problem 1:

Arrange the following activities in the correct sequence from morning to night: 1. Doing Homework, 2. Eating Breakfast, 3. Sleeping, 4. Coming back from school.

Solution:

  1. Eating Breakfast (Morning) \ 2. Coming back from school (Afternoon) \ 3. Doing Homework (Evening) \ 4. Sleeping (Night)

Explanation:

To sequence events, we look at the natural order of a daily routine. Breakfast happens first after waking up, school ends in the afternoon, homework is usually done after school, and sleeping is the final activity of the day.

Problem 2:

Ravi started playing football at 4:304:30 PM. He played for 11 hour and 1515 minutes. At what time did he finish playing?

Solution:

Start Time=4:30 PM\text{Start Time} = 4:30 \text{ PM} Add 1 hour: 4:30+1 hour=5:30 PM\text{Add 1 hour: } 4:30 + 1 \text{ hour} = 5:30 \text{ PM} Add 15 minutes: 5:30+15 minutes=5:45 PM\text{Add 15 minutes: } 5:30 + 15 \text{ minutes} = 5:45 \text{ PM} Finish Time=5:45 PM\text{Finish Time} = 5:45 \text{ PM}

Explanation:

To find the finish time, we add the duration to the start time. First, add the full hours, then add the remaining minutes to the result.