Session 36: Conversion of Mass and Volume

Introdution

Introduction Activity  ( 30 minutes )

Arrange a small “discovery table” at the front of the class with 6–8 everyday objects like: 

A 1-liter water bottle

A 250ml juice box

A packet of rice (1 kg, 500g)

A small shampoo bottle (100ml)

A sugar packet (2 kg)

A tablespoon of oil in a transparent container

Label the items with a number (not with their weight/volume).

Divide students into small groups of 3–4. Each group gets a "Guess Card" to note down their guesses.

They can observe, touch, lift (if safe) and discuss quietly.

Each group writes down their guess for the weight or volume of each item.

Teacher reveals actual weights/volumes one by one.

Groups check how close their guesses were.

Ask:

“Which one surprised you the most?”

“Why do you think you over/underestimated?”

“How does the size affect your guess?”

Main Topic/ Activity  ( 1555 minutes )

(15 minutes)

Facilitate a discussion on units: “How do we measure these?”

Introduce g, kg, ml, and l, and the conversion (1000 g = 1 kg, 1000 ml = 1 l).

Which Unit Would You Use ( 10 minutes )

• Weighing a newborn baby

• Buying a sack of rice from the store

• Measuring the weight of a pencil

• Petrol in a scooter

• Filling a water tank

• Measuring medicine with a spoon

• Amount of water in a small juice box

PROBLEMS:- ( 3025 minutes )

Volume Conversion Problems (ml ↔ l)

1. Convert 3000 milliliters to liters.

Answer: 3 liters

2. Convert 2 liters to milliliters.

Answer: 2000 ml

3. A bottle contains 1.25 l of water. How many milliliters is that?

Answer: 1250 ml

Mass Conversion Problems (g ↔ kg)

1. Convert 2000 grams to kilograms.

Answer: 2 kg

2. Convert 5 kilograms to grams.

Answer: 5000 g

3. A watermelon weighs 3.5 kg. How many grams is that?

Answer: 3500 g

Review

ExpectedQuestions Learning(5 minutes): Outcome:

Knowledge building-

• 1. Convert

     Concept3 understandingkg

     into grams.
  2.  

     AbleConvert to1,500 solveg realinto life problems involving conversion

Skill Building-

Applying and practising knowledge

kilograms.  

TeamHow work

many grams are there in 0.75 kg?  

A

Reviewbox Questions/Assessment/Tasksweighs

2,500

g.

What is its weight in kilograms?

Follow up Tasks (5 minutes )

Home work

• Your school bag weighs 1500 g. What is its weight in kg?

• A cooking oil container holds 1.5 liters. Convert it to milliliters

Expected Learning  Outcome:

Knowledge building-

Concept understanding 

Able to solve real life problems involving conversion

Skill Building-

Applying and practizing knowledge

Team work