Chapter 13: Time Goes On
3rd StandardMathematics
Time Goes On - Chapter Summary
# Time Goes On
## Overview
This chapter helps students understand the concept of time using calendars, clocks, personal life events, and durations of various activities. Students engage with both analog and digital clocks, calculate ages and durations, observe calendar patterns, and explore how time is recorded and used in real life.
---
## Key Topics Covered
### 1. Understanding Calendars
- **Month Observation Activity**: Students observe a calendar month (e.g., July), identify Sundays, Thursdays, and use the calendar to answer questions.
- **Making Calendar**: Students create a calendar for July 2024 and complete exercises related to dates and days.
- **Comparing Years**: By comparing calendars of two years, students determine what stays the same (names of months, days in a week) and what changes (e.g., day-date alignment).
- **Important Facts**:
- 12 months in a year.
- Months with fewer than 30 days (like February).
- 365 days in a year; 52 full weeks and 1 extra day (sometimes 2 in a leap year).
---
### 2. Festivals and Dates
- **Festival Listing**: Students note dates of festivals and personal events like birthdays using the format DD/MM/YY.
- **Identifying Same-Date Events**: Exercises where students circle festivals falling on the same date.
---
### 3. Understanding Age
- **Age Puzzles**: Example – Hetal is twice as old as her brother and also 10 years older; used for logical age deductions.
- **Family Age Calculations**: Using relative ages and events like birth years, students calculate ages of themselves, parents, and grandparents.
- **Birth Certificate Reading**: Students answer questions using the birth certificate of Bincy – understanding date of birth, age at future dates, and number of days old.
---
### 4. Making and Understanding Birth Certificates
- **Student Task**: Fill in a mock birth certificate with personal details.
- **Important Dates**: Students identify dates of school admission and track their educational timeline.
---
### 5. Reading and Understanding Clocks
- **Analog Clock**:
- Understanding hour and minute hands.
- Measuring how long tasks take using clock time (e.g., breakfast from 7:00 to 7:15).
- Drawing clock hands for given times.
- **Daily Routine and Clock Matching**:
- Students match time of day with common activities like waking up, going to school, studying, eating lunch, etc.
---
### 6. Time Duration and Measurement
- **Time Frames**:
- Activities that take months: knitting, growing vegetables like cabbage or cauliflower.
- Weeks: radish growth, basic projects.
- Days: finishing a school chapter.
- Hours and minutes: brushing teeth, eating meals.
- **Activity Time Calculation**:
- Students fill tables estimating how many minutes typical school and daily activities take (like play period, lunch break, brushing teeth).
---
### 7. Digital vs Analog Clocks
- **Digital Clocks**: Time shown in numbers.
- **Analog Clocks**: Time shown using hands on a dial.
- **Sand Clock Making**: DIY project to measure time using two bottles and sand.
---
## New Terms
| Term | Simple Definition |
|------------------|--------------------------------------------------------------|
| Calendar | A table showing days, weeks, and months of a year. |
| Analog Clock | A clock with hands showing hours and minutes. |
| Digital Clock | A clock showing time with numbers. |
| Birth Certificate| A document that shows when and where a person was born. |
| Minute Hand | The longer hand on a clock that shows minutes. |
| Hour Hand | The shorter hand on a clock that shows hours. |
| Duration | How long something takes. |
| Week | A group of 7 days. |
| Month | A period of time in the calendar (e.g., January, February). |
| Year | A period of 12 months or 365 days. |
---
## Practice Problems
### Easy (3)
1. **How many days are there in February (non-leap year)?**
→ **Answer**: 28
2. **What is the first month of the year?**
→ **Answer**: January
3. **What is the time shown if the hour hand is at 3 and the minute hand is at 12?**
→ **Answer**: 3:00
### Medium (2)
4. **If your birthday is on 15th July and today is 10th July, how many days are left?**
→ **Answer**: 5 days
5. **If a movie starts at 6:30 PM and ends at 8:00 PM, how long is the movie?**
→ **Answer**: 1 hour 30 minutes
### Difficult (3)
6. **You start reading at 4:15 PM and stop at 5:00 PM. How many minutes did you read?**
→ **Answer**: 45 minutes
→ **Explanation**: From 4:15 to 5:00 = 45 minutes.
7. **Your school trip was from 12th June to 18th June. How many days did it last?**
→ **Answer**: 7 days
8. **Hetal is 16 years old and her brother is 6 years old. Is she twice as old?**
→ **Answer**: No.
→ **Explanation**: Double of 6 is 12, not 16.
### Very Difficult (2)
9. **Bincy was born on 2 May 2015. How old will she be on 2 May 2030?**
→ **Answer**: 15 years
→ **Explanation**: 2030 - 2015 = 15 years.
10. **A clock shows 2:45. Where are the hour and minute hands?**
→ **Answer**: Hour hand is between 2 and 3; minute hand is on 9
→ **Explanation**: 45 minutes = 9 on the clock; hour hand is ¾ way to 3.
---
## Overview
This chapter helps students understand the concept of time using calendars, clocks, personal life events, and durations of various activities. Students engage with both analog and digital clocks, calculate ages and durations, observe calendar patterns, and explore how time is recorded and used in real life.
---
## Key Topics Covered
### 1. Understanding Calendars
- **Month Observation Activity**: Students observe a calendar month (e.g., July), identify Sundays, Thursdays, and use the calendar to answer questions.
- **Making Calendar**: Students create a calendar for July 2024 and complete exercises related to dates and days.
- **Comparing Years**: By comparing calendars of two years, students determine what stays the same (names of months, days in a week) and what changes (e.g., day-date alignment).
- **Important Facts**:
- 12 months in a year.
- Months with fewer than 30 days (like February).
- 365 days in a year; 52 full weeks and 1 extra day (sometimes 2 in a leap year).
---
### 2. Festivals and Dates
- **Festival Listing**: Students note dates of festivals and personal events like birthdays using the format DD/MM/YY.
- **Identifying Same-Date Events**: Exercises where students circle festivals falling on the same date.
---
### 3. Understanding Age
- **Age Puzzles**: Example – Hetal is twice as old as her brother and also 10 years older; used for logical age deductions.
- **Family Age Calculations**: Using relative ages and events like birth years, students calculate ages of themselves, parents, and grandparents.
- **Birth Certificate Reading**: Students answer questions using the birth certificate of Bincy – understanding date of birth, age at future dates, and number of days old.
---
### 4. Making and Understanding Birth Certificates
- **Student Task**: Fill in a mock birth certificate with personal details.
- **Important Dates**: Students identify dates of school admission and track their educational timeline.
---
### 5. Reading and Understanding Clocks
- **Analog Clock**:
- Understanding hour and minute hands.
- Measuring how long tasks take using clock time (e.g., breakfast from 7:00 to 7:15).
- Drawing clock hands for given times.
- **Daily Routine and Clock Matching**:
- Students match time of day with common activities like waking up, going to school, studying, eating lunch, etc.
---
### 6. Time Duration and Measurement
- **Time Frames**:
- Activities that take months: knitting, growing vegetables like cabbage or cauliflower.
- Weeks: radish growth, basic projects.
- Days: finishing a school chapter.
- Hours and minutes: brushing teeth, eating meals.
- **Activity Time Calculation**:
- Students fill tables estimating how many minutes typical school and daily activities take (like play period, lunch break, brushing teeth).
---
### 7. Digital vs Analog Clocks
- **Digital Clocks**: Time shown in numbers.
- **Analog Clocks**: Time shown using hands on a dial.
- **Sand Clock Making**: DIY project to measure time using two bottles and sand.
---
## New Terms
| Term | Simple Definition |
|------------------|--------------------------------------------------------------|
| Calendar | A table showing days, weeks, and months of a year. |
| Analog Clock | A clock with hands showing hours and minutes. |
| Digital Clock | A clock showing time with numbers. |
| Birth Certificate| A document that shows when and where a person was born. |
| Minute Hand | The longer hand on a clock that shows minutes. |
| Hour Hand | The shorter hand on a clock that shows hours. |
| Duration | How long something takes. |
| Week | A group of 7 days. |
| Month | A period of time in the calendar (e.g., January, February). |
| Year | A period of 12 months or 365 days. |
---
## Practice Problems
### Easy (3)
1. **How many days are there in February (non-leap year)?**
→ **Answer**: 28
2. **What is the first month of the year?**
→ **Answer**: January
3. **What is the time shown if the hour hand is at 3 and the minute hand is at 12?**
→ **Answer**: 3:00
### Medium (2)
4. **If your birthday is on 15th July and today is 10th July, how many days are left?**
→ **Answer**: 5 days
5. **If a movie starts at 6:30 PM and ends at 8:00 PM, how long is the movie?**
→ **Answer**: 1 hour 30 minutes
### Difficult (3)
6. **You start reading at 4:15 PM and stop at 5:00 PM. How many minutes did you read?**
→ **Answer**: 45 minutes
→ **Explanation**: From 4:15 to 5:00 = 45 minutes.
7. **Your school trip was from 12th June to 18th June. How many days did it last?**
→ **Answer**: 7 days
8. **Hetal is 16 years old and her brother is 6 years old. Is she twice as old?**
→ **Answer**: No.
→ **Explanation**: Double of 6 is 12, not 16.
### Very Difficult (2)
9. **Bincy was born on 2 May 2015. How old will she be on 2 May 2030?**
→ **Answer**: 15 years
→ **Explanation**: 2030 - 2015 = 15 years.
10. **A clock shows 2:45. Where are the hour and minute hands?**
→ **Answer**: Hour hand is between 2 and 3; minute hand is on 9
→ **Explanation**: 45 minutes = 9 on the clock; hour hand is ¾ way to 3.
---
Time Goes On
Overview
This chapter helps students understand the concept of time using calendars, clocks, personal life events, and durations of various activities. Students engage with both analog and digital clocks, calculate ages and durations, observe calendar patterns, and explore how time is recorded and used in real life.
Key Topics Covered
1. Understanding Calendars
- Month Observation Activity: Students observe a calendar month (e.g., July), identify Sundays, Thursdays, and use the calendar to answer questions.
- Making Calendar: Students create a calendar for July 2024 and complete exercises related to dates and days.
- Comparing Years: By comparing calendars of two years, students determine what stays the same (names of months, days in a week) and what changes (e.g., day-date alignment).
- Important Facts:
- 12 months in a year.
- Months with fewer than 30 days (like February).
- 365 days in a year; 52 full weeks and 1 extra day (sometimes 2 in a leap year).
2. Festivals and Dates
- Festival Listing: Students note dates of festivals and personal events like birthdays using the format DD/MM/YY.
- Identifying Same-Date Events: Exercises where students circle festivals falling on the same date.
3. Understanding Age
- Age Puzzles: Example – Hetal is twice as old as her brother and also 10 years older; used for logical age deductions.
- Family Age Calculations: Using relative ages and events like birth years, students calculate ages of themselves, parents, and grandparents.
- Birth Certificate Reading: Students answer questions using the birth certificate of Bincy – understanding date of birth, age at future dates, and number of days old.
4. Making and Understanding Birth Certificates
- Student Task: Fill in a mock birth certificate with personal details.
- Important Dates: Students identify dates of school admission and track their educational timeline.
5. Reading and Understanding Clocks
-
Analog Clock:
- Understanding hour and minute hands.
- Measuring how long tasks take using clock time (e.g., breakfast from 7:00 to 7:15).
- Drawing clock hands for given times.
-
Daily Routine and Clock Matching:
- Students match time of day with common activities like waking up, going to school, studying, eating lunch, etc.
6. Time Duration and Measurement
-
Time Frames:
- Activities that take months: knitting, growing vegetables like cabbage or cauliflower.
- Weeks: radish growth, basic projects.
- Days: finishing a school chapter.
- Hours and minutes: brushing teeth, eating meals.
-
Activity Time Calculation:
- Students fill tables estimating how many minutes typical school and daily activities take (like play period, lunch break, brushing teeth).
7. Digital vs Analog Clocks
- Digital Clocks: Time shown in numbers.
- Analog Clocks: Time shown using hands on a dial.
- Sand Clock Making: DIY project to measure time using two bottles and sand.
New Terms
| Term | Simple Definition |
|---|---|
| Calendar | A table showing days, weeks, and months of a year. |
| Analog Clock | A clock with hands showing hours and minutes. |
| Digital Clock | A clock showing time with numbers. |
| Birth Certificate | A document that shows when and where a person was born. |
| Minute Hand | The longer hand on a clock that shows minutes. |
| Hour Hand | The shorter hand on a clock that shows hours. |
| Duration | How long something takes. |
| Week | A group of 7 days. |
| Month | A period of time in the calendar (e.g., January, February). |
| Year | A period of 12 months or 365 days. |
Practice Problems
Easy (3)
-
How many days are there in February (non-leap year)?
→ Answer: 28 -
What is the first month of the year?
→ Answer: January -
What is the time shown if the hour hand is at 3 and the minute hand is at 12?
→ Answer: 3:00
Medium (2)
-
If your birthday is on 15th July and today is 10th July, how many days are left?
→ Answer: 5 days -
If a movie starts at 6:30 PM and ends at 8:00 PM, how long is the movie?
→ Answer: 1 hour 30 minutes
Difficult (3)
-
You start reading at 4:15 PM and stop at 5:00 PM. How many minutes did you read?
→ Answer: 45 minutes
→ Explanation: From 4:15 to 5:00 = 45 minutes. -
Your school trip was from 12th June to 18th June. How many days did it last?
→ Answer: 7 days -
Hetal is 16 years old and her brother is 6 years old. Is she twice as old?
→ Answer: No.
→ Explanation: Double of 6 is 12, not 16.
Very Difficult (2)
-
Bincy was born on 2 May 2015. How old will she be on 2 May 2030?
→ Answer: 15 years
→ Explanation: 2030 - 2015 = 15 years. -
A clock shows 2:45. Where are the hour and minute hands?
→ Answer: Hour hand is between 2 and 3; minute hand is on 9
→ Explanation: 45 minutes = 9 on the clock; hour hand is ¾ way to 3.