2nd Maths: Term 3 Unit 3: Measurement
Teacher’s Note: Teacher can make students understand the need of standard measures.
Measuring weight using simple balance
Travel Through
Bharath and Kannagi buy grapes from two different fruit sellers from the road side shop.
Teacher’s Note: Teacher can make students understand the need of standard measures.
Learn
Small things can be weighed using simple balance.
Big things can be weighed using weighing machine.
A simple balance has two pans.
The pan with heavier object comes down.
The pan with lighter object goes up.
If both the objects are equal in weight, the pans will be in the same level.
Practice
A. Fill the boxes with ‘H’ for heavy and ‘L’ for light.
B. Tick (✔) the lighter side and cross (X) the heavier side of the simple balance.
Pleasure Time
Match the objects with the suitable balance that are used to measure the weight.
Objects to Match:
Jaggery
Beads
Rice bag
Sugar bag
Goldstuds
Elaichi
Activity
* Take two coconut shells, thread and a ruler.
* Tie the thread at the centre of the ruler.
* Tie the shells on both sides at equal distance from its centre. Now, the simple balance is ready.
* Take some marbles, pencil, eraser, crayons, chalk piece, paper, pencil box and paper.
* The children can be divided into group of three each.
* One child keeps the objects whose weight is to be measured on the right pan of the balance.
* The other child keeps adding marbles on the left pan of the balance till both the pans are balanced.
* The third child counts the marbles and records the weight of different objects.
