Measurement - Class 3 Science - New St. Mery English School 

Learn all about Measurement in this easy and child-friendly Class 3 Science explanation. This lesson covers what measurement is, why we need it, and the different units used to measure length, weight, and capacity. Students will also understand the difference between standard and non-standard units with simple examples. Perfect for CBSE Class 3 students, teachers, and parents looking for clear and helpful science notes.

Measurement - Class 3 Science - New St. Mery English School 

What is measurement ?

Ans- Measurement is the way to know the number of size or quantity of anything.

What is unit?

Ans:- Unit is a physical quantity that is used to measure anything.

Ex:- length is measured by kilometer or meter

        Weight is measured by Kilogram or gram

        Capacity is measured by liter or milliliter

        Time is measured by hour, minute or second

How many types of units?

Ans:- There are two types of units.

           1- Non-standard units

           2- Standard units

 

What are Non-standard units?

Ans:- Those units that vary from person to person are called Non-standard units.

          Ex:- handspan, cubit, stride and footspan

What are Standard units?

Ans:- Those units that are used for accurate measurement are called standard units.

          Ex:- Standard units for length are Kilometre, Metre, Centimetre

                  Standard units for weight are Kilogram, gram

                  Standard units for capacity are litre, mililitre

                  Standard units for time are hour, minute, second

Which unit is used to measure very small length?

Ans- Millimetre

Which unit is used to measure long lenght such as distance?

Ans:- Kilometre

What is the SI unit of length?

Ans:- Metre

Write the name of instrument that is used to measure length.

Ans:- Scale and Measuring tape

Which unit is used to measure weight of lighter things?

Ans:- Gram

Which unit is used to measure weight of heavier things?

Ans:- Kilogram

What is the SI unit of weight?

Ans:- Kilogram

Write the name of instrument that is used to measure weight.

Ans:- Weighing balance and Electronic weighing balance

Which unit is used to measure the capacity of smaller containers?

Ans- Millilitre

Which unit is used to measure the capacity of large containers?

Ans- Litre

What is the SI unit of capacity?

Ans:- litre

Write the name of instrument that is used to measure capacity.

Ans:- measuring cup, measuring cylinder, measuring flask

How did people know the time in ancient time?

Ans:- People knew the time in ancient time by the position of the Sun.

What is the SI unit of time?

Ans:- Second