Math > Year 2

Measuring & Comparing Mass in kg & g

Mass:
It is defined as a measurement of how heavy or how light something is.

 

How to measure the mass of an object? 

We can use a weighing machine to measure the mass of an object.

 


 

Units of mass: Mass can be measured in kilograms and grams. 

 



 

 

1kg = 1,000g
 

How to record the weight of the objects? 

Weight in kilograms:

 


 

We can see that the red needle is coinciding with 4 kg.

That means the weight of the pumpkin is 4 kg. 
 

Weight in grams:


 

We can see that the needle is pointing towards 300 g.

That means the weight of a mangos 300g. 

 

How can we compare the masses of different objects? 


 

Example:

Choose the correct symbol. 


 

Weight of cat = 6kg

Weight of dog = 9 kg

Weight of cat < Weight of dog


 

 

Let’s try a question: 

Question: Put the correct symbol.
 


 

Answer:

Weight of the carrots = 7 kg

Weight of the tomatoes = 2 kg

7 kg > 2kg
 


 

 


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