Units of Capacity

Lesson Planning of Units of Capacity

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Lesson Planning of Conversion of Units of Capacity

Subject Mathematics

Grade 4th

Students` Learning Outcomes

  • Convert liter into millilitres and vice versa.

Information for Teachers

  • Capacity can be measured by using millilitres and liter.
  • Liter is denoted as L and millilitre as ml.
  • The liter was introduced in France in 1795 as “unit of measurement” which is derived from a French unit ‘litron’.
  • One liter of liquid water has a mass of almost exactly one kilogram.
  • Mill means 1000th part which is used for measuring small quantities.
  • 1 liter = 1000 millilitres.
  • Liters can be converted into millilitres by multiplying liters with 1000, so, ml = L x 1000.
  • Milliners can be converted into liters by dividing millilitre with 1000 so, L = ml/1000.

Units of Capacity

  • During this lesson the teacher should consult with textbook at each level wherein and whenever it is required.

Material / Resources

Writing board, chalk/marker, duster, plastic bottles of different sizes, a medicine dropper, water glass, syringe, a cup of tea, syrup, note book and textbook

Introduction

  • Ask the students: have you ever noticed how much water your bottle contains?
  • Show them label of the bottle that it can hold 1 liter or 1000 millilitre of water in it.
  • A cup of tea can hold about 500 ml of tea.
  • A glass of water can hold about 250 ml of water in it.

Development

 

Activity 1

Conversion from Liter to Millilitre:

  • Write on the board : as;
  • 1 L = 1000 ml
  • Show the students plastic bottles with different capacities written on them e.g. ½ litter, 1 liter, 1 ½ litters and 2 ½ litters.
  • Ask a student to write capacity of these bottles on the board in a table format and calculate total.

Students

1

2

3

Total

 

 

1.5 L

 

4.5 L

 

  • Convert these litters in millilitres, as;
  • Total capacity of bottles = 4. 5 L
  •  1 L  = 1000 ml
  • Millilitres   = Liter x 1000
  • Total capacity of bottles in millilitres = 4.5 x 1000 = 4500 ml.
  • So how many millilitres 1.5 liter contains? ( 1.5 x 1000 = 1500 ml)
  • Talk about different items measured in millilitres:

 

  1. Milk
  2. Juices
  3. Water
  4. Syrup

 

 

Activity 2

Conversion from Millilitre to Liter:

  • Show the students different products like syringe, syrup and dropper etc. and mention their capacity on them in ml.
  • Calculate the total capacity of all the products.
  • Tell them by writing on the board that now we will convert these millilitres into liters, as;
  • Total capacity of products = 4 ml
  • 1000 ml = 1 L
  • L = ml/1000
  • Total capacity of products in liters = 41000 = 0.0041 L

 

Sum up / Conclusion
  • Repeat the key points that you discussed during this lesson.
  • Capacity can be measured in liter and millilitres.
  • Liter is used to measure capacity of large whereas millilitre to measure small products.
  • Mill means 1000th part.
  • Liters can be converted into millilitres by multiplying liters with 1000 so, ml = L x 1000 ml.
  • Millilitres can be converted into liters by dividing millilitre with 1000 so, L = ml /1000.
  • Satisfy the students if still someone have problem in understanding the concept.

Assessment

  • Convert the following capacities in the given capacities: as;
  • 18. 3 L = ________ml,
  • 215 ml = ________L,
  • 29 L    = ________ml,
  • 33.3 L = ________ml,
  • 55 ml  = ________L

Follow up

  • Assign homework to further strengthen their concepts, as;
  • Three students gifted three bottles of juice to their teachers of 1.5 litters, 1 litter and 500 ml. calculate the total quantity and convert the total juice in ml.

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