Length Measurement in Class IV: Chapter V

Students in Class IV, Chapter V learn to recognize units of length, use measuring tools, convert units, and apply length concepts in daily life. The content covers non-standard and standard units of measurement with examples, along with a fun fact about the origins of the word "length."

• Length Measurement
• Education
• Units
• Measuring Tools
• Metric System

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1. Class IV Chapter - V

2. LEARNING OBJECTIVES- STUDENTS WILL ABLE TO - RECOGNISE UNITS OF LENGTH USE MEASURING TOOLS TO MEASURE LENGTH. EXPLAIN PURPOSE OF MEASURING LENGTH. CONVERT THE UNITS OF LENGTH. ADD AND SUBTRACT LENGTH GIVEN IN DIFFERENT UNITS. APPLY THE CONCEPT OF LENGTH IN DAY TO DAY LIFE.

3. LENGTH BASICS https://youtu.be/LLnfk0EofZM INTRODUCTION

4. https://www.youtube.com/watch?v=KUvkVtRx9qg Video lecture on activity of length

6. FUN FACT- THE WORD LENGTH COMES FROM MIDDLE ENGLISH LENTHE AND FROM OLD ENGLISH LENGOU WHICH MEANS PROPERTY OF BEING LONG OR EXTENDED IN ONE DIRECTION. THE METRIC SYSTEM OF MEASURING LENGTH WAS FIRST ADOPTED IN FRANCE AND IS CURRENT LY USED BY AROUND 95% OF THE WORLD POPULATION.

7. NON STANDARD UNITS OF MEASUREMENT- IN EARLY DAYS BODY PARTS WERE USED TO MEASURE LENGTH . BUT MEASUREMENTS TAKEN BY THESE MEANS ARE NOT ACCURATE AND CONSISTENT. IF WE USE OUR HAND SPAN TO MEASURE LENGTH THE MEASURE TAKEN BY THE DIFFERENT PERSON WILL VARY AS OUR HAND SPANS ARE NOT EQUAL.

8. EXAMPLES OF NON STANDARD UNITS OF MEASUREMENT- A CHILD HAND SPAM IS SMALLER THAN THE ADULT . SO HAND SPAM , HAND, FOOT ARE NOT STANDARD UNIT OF MEASUREMENT.

9. STANDARD UNITS OF MEASUREMENT- MEASUREMENT DOES NOT GIVE SAME RESULTS. SO WE NEED TO USE SOME STANDARD UNITS TO MEASURE LENGTH . WE OBSERVE THAT NON STANDARD UNIT OF

10. EXAMPLES OF STANDARD UNITS OF MEASUREMENT- WE MEASURE LENGTH OF TABLE EDGE, LENGTH OF CHALK, LENGTH OF PENCIL ETC IN CENTIMETERS(CM). LENGTH OF A ROOM , HEIGHT OF TREE, LENGTH OF CLOTH, HEIGHT OF AN ELECTRIC POLE IN METER(M) AND LONGER DISTANCE SUCH AS DISTANCE BETWEEN TWO PLACES IN KILOMETER(K)

11. STANDARD UNIT OF LENGTH- THE STANDARD UNIT OF LENGTH IS METER ONE METER IS DIVIDED INTO HUNDRED SMALLER UNITS CALLED CENTIMETERS. I.E.- 1M = 100CM METER IS DENOTED SHORTLY AS M CENTIMETER IS DENOTED AS CM AND KILOMETER IS DENOTED AS KM 1KM = 1000M

12. INSTRUMENT OF MEASUREMENT OF LENGTH- WE USE METRIC RULER, MATRIC STICK , TAPE, ROD ETC TO MEASURE LENGTH.

13. CONVERSIONS- CONVERTING BIGGER UNITS IN TO SMALLER UNITS CONVERTING METERS INTO CENTIMETRES 1 M = 100CM

14. CONVERSIONS- CONVERTING BIGGER UNITS IN TO SMALLER UNITS CONVERTING KILOMETERS TO METER 1KM = 1000M

15. CONVERSIONS- CONVERTING BIGGER UNITS IN TO SMALLER UNITS CONVERTING METER AND CENTIMETERS INTO CENTIMETERS

16. CONVERSIONS- CONVERTING BIGGER UNITS IN TO SMALLER UNITS CONVERTING KILOMETERS AND METERS INTO METERS

17. CONVERSIONS- CONVERTING SMALLER UNITS IN TO BIGGER UNITS CONVERTING CENTIMETERS INTO METRES

18. CONVERSIONS- CONVERTING SMALLER UNITS IN TO BIGGER UNITS CONVERTING METERS INTO KILOMETRES

19. CONVERSIONS- CONVERTING SMALLER UNITS IN TO BIGGER UNITS CONVERTING CENTIMETERS INTO METERS AND CENTIMETETRES

20. CONVERSIONS- CONVERTING SMALLER UNITS IN TO BIGGER UNITS CONVERTING METERS INTO KILOMETERS AND METERS

21. ADDITION AND SUBTRACTION

22. FRAYERS MODEL MEANING HOW LONG AN OBJECT IS LENGTH LENGTH EXAMPLE LENGTH OF A ROW, LENGTH OF A RIVER METRE, CENTIMETRE, KILOMETRE METRE TO CM, KM TO M AND VICE VERSA NON EXAMPLE LENGTH OF WATER UNITS STANDARD OF MEASUREMEN T TO CHANGE THE UNIT FROM ONE FORM TO ANOTHER TO PERFORM ADDITION AND SUBTRACTION LITRE, GRAM CONVERSION METRE TO LITRE 2 l + 3 m 6 km + 3 kl ADDITION AND SUBTRACTION 2 m + 3 m= 5 m 6km+3 km=9 km

23. ART INTEGRATION SYMMETRY IN PLANE SHAPES IS POSSIBLE ONLY IF WE MEASURE THE PERFECT LENGTH

24. ART INTEGRATION A PERFECT CIRCLE CAN BE DRAWN WITH THE CORRECT MEASURE OF RADIUS

25. ART INTEGRATED EDUCATION

26. CONCEPT MAP LENGTH MEASUREMENT UNIT STANDARD UNIT NONSTANDARD UNIT CONVERSION

27. THANK YOU