Comparison of weight

UNIT 3

Measurement

Comparison of weight

Travel Through

Thenaliraman and two villagers went to a town to visit their king. They want to give some gifts to him.

Teacher’s Note: Discuss the story with children and make them realize the concept of heavy and light.

Learn

Blow and Observe

i) Place a feather, a dry leaf, a key and a nail cutter on a table. Blow the things. What did you observe?

The feather and dry leaf moved away from the table but the nail cutter and keys did not, why? Feather and dry leaf are lighter and nail cutter and keys are heavier. So lighter objects fall down when air is blown.

ii) Compare the weight of the objects that are placed on the table.

Sharpener is lighter than the book.

Pencil box is heavier than the eraser

Teacher’s Note: Teacher can instruct children to carry two things at a time and say which one is heavier or lighter.

Practice

From your school bag, lift the objects given below and answer the following questions.

Practice

Compare the weight of objects given below and order them from lightest to heaviest by giving numbers 1, 2, and 3.