Do you know what 'soap' is?

Do you know what is a catalyst ?

Living things and non living things : Do you know that you are a living being? How can you.say that?

Do you know to catch fish in pond?

How do you know that rusting of iron is a change? If a raw egg is boiled in water, what changes do you notice in it ? Explain.

Do you know why the floated seeds are lighter in weight?

Do you know which part of the plant gives rise to fruit ?

Do you know we also use some particulate pollutants? Could you list some of them?

How do you know that rusting of iron is a change? If you are given two eggs, can you determine which one is boiled and which one is not ? Explain.

Do you know why a person gets tired standing at a place for a long time ?