Learning Objectives (अधिगम उद्देश्य)
By the end of the lesson, students will be able to:
English
- Understand the meaning and importance of measurement.
- Identify standard units used to measure length, mass, capacity, time, and temperature.
- Use different measuring instruments correctly.
- Convert simple units of measurement.
- Apply measurement skills in everyday life.
हिन्दी
- मापन (Measurement) का अर्थ और महत्व समझेंगे।
- लंबाई, द्रव्यमान, क्षमता, समय और तापमान की मानक इकाइयों की पहचान करेंगे।
- विभिन्न मापने वाले उपकरणों का सही उपयोग करना सीखेंगे।
- सरल इकाई परिवर्तन (Unit Conversion) कर सकेंगे।
- दैनिक जीवन में मापन का उपयोग समझेंगे।
Key Vocabulary (मुख्य शब्दावली)
English
हिन्दी
Measurement
मापन
Length
लंबाई
Distance
दूरी
Mass
द्रव्यमान
Weight
भार (सामान्य उपयोग)
Capacity
क्षमता
Volume
आयतन
Time
समय
Temperature
तापमान
Scale/Ruler
पैमाना
Measuring Tape
फीता
Balance
तराजू
Thermometer
तापमापी
Stopwatch
स्टॉपवॉच
Teaching Aids
- Ruler (15 cm and 30 cm)
- Measuring tape
- Meter scale
- Weighing balance
- Measuring jug
- Thermometer (demonstration)
- Stopwatch or clock
- Water bottle
- Classroom objects for measurement
Previous Knowledge
Ask students:
- How do we know how tall we are?
- How do shopkeepers measure rice or sugar?
- How do we know the temperature when we have a fever?
- How do we measure the amount of water in a bottle?
Introduction (5–10 Minutes)
Hold a pencil and ask:
- Is this pencil long or short?
- How can we know its exact length?
Show a ruler.
Explain:
We use measurement to know the exact size, length, weight, capacity, or time.
हिन्दी
किसी वस्तु की सही लंबाई, वजन, क्षमता, समय या तापमान जानने के लिए मापन किया जाता है।
Study Material
What is Measurement? (मापन क्या है?)
English
Measurement is the process of finding the size, length, weight, capacity, temperature, or time of an object using standard units.
Measurement helps us compare objects accurately.
Examples:
- Measuring height
- Buying fruits by weight
- Measuring milk
- Checking body temperature
हिन्दी
किसी वस्तु की लंबाई, द्रव्यमान, क्षमता, समय या तापमान ज्ञात करने की प्रक्रिया को मापन कहते हैं।
मापन हमें वस्तुओं की सही तुलना करने में सहायता करता है।
Why is Measurement Important? (मापन का महत्व)
English
Measurement helps us:
- Build houses
- Stitch clothes
- Cook food
- Buy and sell goods
- Play sports
- Conduct scientific experiments
हिन्दी
मापन का उपयोग:
- घर बनाने में
- कपड़े सिलने में
- खाना बनाने में
- वस्तुएँ खरीदने-बेचने में
- खेलों में
- विज्ञान के प्रयोगों में
Types of Measurement
1. Measurement of Length (लंबाई का मापन)
English
Length tells us how long or tall an object is.
Standard Units
- Millimetre (mm)
- Centimetre (cm)
- Metre (m)
- Kilometre (km)
Instruments
- Ruler
- Measuring tape
- Meter scale
Examples
- Pencil → cm
- Door → m
- Road → km
हिन्दी
लंबाई किसी वस्तु के लंबे या छोटे होने को बताती है।
इकाइयाँ:
- मिलीमीटर
- सेंटीमीटर
- मीटर
- किलोमीटर
2. Measurement of Mass (द्रव्यमान का मापन)
English
Mass tells us how heavy an object is.
Units
- Gram (g)
- Kilogram (kg)
Instrument
Weighing balance
Examples
- Chocolate → g
- Rice bag → kg
हिन्दी
द्रव्यमान किसी वस्तु की मात्रा को बताता है।
इकाइयाँ:
- ग्राम
- किलोग्राम
3. Measurement of Capacity (क्षमता का मापन)
English
Capacity is the amount of liquid a container can hold.
Units
- Millilitre (mL)
- Litre (L)
Instrument
Measuring jug
Examples
- Medicine → mL
- Milk → L
हिन्दी
क्षमता किसी पात्र में आने वाले द्रव की मात्रा है।
इकाइयाँ:
- मिलीलीटर
- लीटर
4. Measurement of Time (समय का मापन)
English
Time tells us when an event happens and how long it lasts.
Units
- Second
- Minute
- Hour
- Day
- Month
- Year
Instruments
- Clock
- Watch
- Stopwatch
हिन्दी
समय किसी घटना के होने का समय और उसकी अवधि बताता है।
5. Measurement of Temperature (तापमान का मापन)
English
Temperature tells us how hot or cold something is.
Instrument
Thermometer
Unit
Degree Celsius (°C)
Examples
- Body temperature
- Weather temperature
हिन्दी
तापमान किसी वस्तु के गर्म या ठंडा होने का माप है।
Standard and Non-Standard Units
Non-Standard Units
Examples:
- Hand span
- Footstep
- Cubit
These are not accurate because they differ from person to person.
हिन्दी
गैर-मानक इकाइयाँ:
- हाथ की चौड़ाई
- कदम
- बाँह की लंबाई
Standard Units
Standard units are accepted everywhere and give accurate measurements.
Examples:
- cm
- m
- km
- g
- kg
- L
- mL
हिन्दी
मानक इकाइयाँ पूरे विश्व में समान रूप से उपयोग की जाती हैं।
Simple Unit Conversions
Measurement
Conversion
10 mm
= 1 cm
100 cm
= 1 m
1000 m
= 1 km
1000 g
= 1 kg
1000 mL
= 1 L
60 seconds
= 1 minute
60 minutes
= 1 hour
Everyday Uses of Measurement
English
- Buying vegetables
- Measuring cloth
- Cooking recipes
- Filling petrol
- Building bridges
- Sports competitions
हिन्दी
- सब्ज़ियाँ खरीदना
- कपड़ा नापना
- खाना बनाना
- पेट्रोल भरना
- भवन निर्माण
- खेल प्रतियोगिताएँ
Classroom Activities
Activity 1 – Measure Around the Classroom
Students measure:
- Pencil
- Notebook
- Desk
- Door
- Blackboard
Record the measurements.
Activity 2 – Guess and Measure
Students first estimate the length of an object, then measure it using a ruler and compare the results.
Activity 3 – Capacity Challenge
Using a measuring jug, students pour:
- 100 mL
- 250 mL
- 500 mL
- 1 L
Discuss the differences.
Activity 4 – Weight Comparison
Using a weighing balance, compare:
- Apple
- Eraser
- Book
- Water bottle
Board Work
MEASUREMENT Length → cm, m, km Mass → g, kg Capacity → mL, L Time → s, min, hr Temperature → °C Instruments Ruler Tape Balance Thermometer Clock
Values Developed
- Accuracy
- Observation
- Scientific thinking
- Problem-solving
- Careful handling of measuring instruments
Assessment
Oral Questions
- What is measurement?
- Name two units of length.
- Which instrument measures temperature?
- Which unit is used to measure milk?
- Which unit is used to measure rice?
Worksheet
A. Fill in the Blanks
- Length is measured in __________.
- Mass is measured in __________ and __________.
- Capacity is measured in __________ and __________.
- A thermometer measures __________.
- One metre equals __________ centimetres.
B. True or False
- A ruler measures length. ( )
- Milk is measured in kilograms. ( )
- Temperature is measured using a thermometer. ( )
- One kilogram equals 1000 grams. ( )
- One litre equals 100 millilitres. ( )
C. Match the Following
Column A
Column B
Ruler
Length
Balance
Mass
Thermometer
Temperature
Measuring Jug
Capacity
Stopwatch
Time
D. Short Answer Questions
- What is measurement?
- Name three measuring instruments.
- Write two units of length.
- What is capacity?
- Which instrument measures temperature?
E. Long Answer Questions
- Explain the importance of measurement in daily life.
- Describe the different types of measurement with examples.
- Explain the difference between standard and non-standard units.
- Write five uses of measurement in everyday life.
- Explain the instruments used for measuring length, mass, capacity, time, and temperature.
Homework
- Measure the length and width of five objects at home and record them in a table.
- List five items measured in kilograms and five items measured in litres.
- Draw and label a ruler, weighing balance, measuring jug, and thermometer.
- Learn the standard units and complete the unit conversion table.