How it works-

 You have to take card stock or any thick paper cut it in half .Then take a cup and fill it with water ¾ of the cup ,then place the cardstock on the brim of the glass of water. Then gently tip over the glass. And boom! You’ll see water pressure in act.(Remember to do this in front of a sink!)

How it turned out-

It was a fun experiment, and it showed me how water pressure actually works, This was a fun experiment and when I was younger I thought this was magic ,but thanks to Ekta ma’am I know it’s not magic it’s just physics.

Bonus-

I did also try this experiment with tissue paper. The experiment was was done as above except I changed one factor, the cardstock .It didn’t work and all the water leaked. I  also used coaster, this experiment worked well with that

(sadly I couldn't get a video but here is photo that looks really similar to what I did.)

Process: Put water on a plate, and light a candle on top of that. Take a glass and cover the candle. The candle will get extinguished because there is not enough oxygen needed by the candle to stay lit. 

Materials Needed: Candle, Lighter, Glass, Plate, Water

Observations: I saw the water rise in the glass while the fire was getting extinguished because there was more space being created because of the oxygen being consumed 

Observation:
I saw that the candle’s fire goes out after a few seconds. This happens because the burning candle heats the air above it and it uses up all the oxygen trapped inside the glass. When the candle goes out, the air in the glass cools and becomes vapour. The pressure inside the glass goes below the atmospheric pressure because there is no air left inside the glass (a vacuum is created). Water is drawn into the glass until the pressure is equalized.

To find out the effect of atmospheric pressure on an object

 Requirements:
 
 
-           A glass of water

-          A straw (preferably made out of plastic) 

 
Method: 

 
Take a glass and fill it with water. Next put a straw inside the glass. Wait for some water to fill up the straw. After doing this, take the straw out. 

This time, cover the top end of the straw with your finger and then put it inside the glass. 

 
Observation: 

 
First try – The water did not stay inside the straw. 

Second try – The water stayed inside the straw this time. 

 
Conclusion:
 
 
While taking the straw out of the glass, air kept entering the inside of it and pushed the water out. Also, gravity pulled the water down. 

 
Since the top end of the straw was covered with my finger, there was not much air to push the water out. The atmospheric pressure acting on the bottom end of the straw was more than the pressure of air inside the straw and gravity trying to pull the water down. 

Hence, nothing can push the water out this time.