P23 - Air has weight or Not?

It's been long time, we both were busy in her school activities, Gymnastics and Bharatnatyam classes.  Now, the summer break started and we are back to share some interesting activities.

Today, we experimented whether the air has weight or not. 

I asked her, do you think air has weight. She said no mumma, air has no weight. I said, lets confirm this with an experiment.

What you Need:
        - Two Balloons 
        - One stick
        - Three rubber bands
        - Something to make a scale (we used a hanger) 
        - Needle or Safety Pin 

Blow the balloons so that they are of same size. Use a stick and hanger to make a scale where both the balloons are tied on each side.

I again checked if she wants to change her answer about air weight. But she had never experienced air weight so she didn't. 

Now, I asked her to prick one of the balloon with the needle. 

You can make out from her smile that she understood that air has weight.  When she pricked one balloon the balance changed and the scale move down to the side with balloon. She knew that the scale will move down to the heavier side. As always she liked the experiment.

To make it more clear take two things with different weight and tie it in a balance and show how the balance moves down to the side with more weight.

P22 - Slime with Cornflour

Inu and Deeksha (her cousin) were very excited for their winter break as they planned to stay together during the break. The slime making actually started with a visit to an exhibition where they both played with slime.

Can we make slime at home mausi, Deeksha asked. And here we began with making slime.

What you Need:
        - Cornflour
        - Water
        - Food Colouring
        - Bowl
        - Spoon

We are ready with all the things.

Take the small quantity of cornflour in the bowl. 

Add little food colouring in it.

Mix small amount of water in the cornflour until a thick slime forms. Use the spoon to stir the cornflour while adding the water. 

Cornflour slime is a stir-thickening fluid which means its viscosity* changes depending on whether or not the fluid is stirred. If we apply the force by stirring or punching it , it becomes thick. And if we remove the force it becomes runny again. 

[*Viscosity is the state of being thick, sticky, and semi-fluid in consistency, due to internal friction.]

Deeksha and Inu both enjoyed playing with their self made slime.