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A steel spoon, a rubber band, a glass marble, a cotton cloth. Each is made of something different.

Four objects. Four materials.

This is Chapter 6, Materials Around Us, in your NCERT book.

What you will do

Find how an object differs from its material.
Test if a material is hard or soft.
Test if light passes through it.
Test if it floats or sinks.
Test if it dissolves in water.
Pick the right material for a job.
Find which materials are shiny and which are dull.

You do every test on the screen.