P29 - Handmade Bookmark

 Hi All,

Today I am sharing a very easy bookmark technique.

Below is the photo of bookmarks created by us.

If you like this simple technique, make one for you.

P28 - Water is heavier than ice?

Summer break is about to end in few days. This summer break we did fun questions everyday. The question could be learning a mathematics trick or any craft item or writing few lines on some topic. Deeksha, Ovee and Inu participated with full enthusiasm.

Today's fun question was

All three of them gave the different replies. It is nice to see that they tried to give the logic for their answers. One of them said that the water and ice will have the same weight as we have taken the same amount of water and refrigerated it. Another marked that the ice will be heavier as it is in solid state and in solid state molecules are stuck tightly together. The last answer was water will be heavier because it has less density. If you are interested to learn about density concept, please click-here and read our blog post on it.

After reading their answers, I asked them whether they had lime water in summers. Have they ever put ice-cubes in a glass of water. What they have observed when they put a ice-cube in water, whether it floats or it sinks down. Of-course the ice-cubes floats on water. So the water is heavier than the ice. 

Then we did an experiment to support our answer.

 

What we need:

• Two bowls
• Ice and water
• Balance Scale

 

Experiment:  

Take one bowl full of ice and one bowl filled with water. Measure the weight of both the bowls and compare. We didn't had any balance scale at home. So, we created one with the help of hanger, zip-lock bags and fruit bags.

Here, we can clearly see that the water is heavier than the ice. Congratulations Ovee, your answer was correct. And that is the reason why icebergs float over the sea.

 

Now, lets understand what happen when we try to refrigerate the water in a bowl. Water molecules loses energy and forms more stable hydrogen bonds (H-bond) when refrigerated. This processes decreases the density as each water molecules is held away a distance equal to the length of each H-bond from each water molecules.

 

The relations between density and mass (weight) is  mass = density * volume.

P27 - Air is required for burning

 

My mom asked what do you think whether air is required for burning. I told, Yes I know, air is required for burning. I have read about it in my Grade 2. But I haven't done the experiment to check it myself. So, I decided to do the experiment with the help of my mom. 

 What you need:

• Glass
• Candle
• Match box
  

Steps:

1.  Lit the candle using matchstick.

2. Put the glass upside down straight on one candle.  I noticed that after some time the candle with glass stopped burning.

 

3. I was using the magic candle, that is why when I removed the glass from the candle, it lit again. 

 

Conclusion:

We learnt that oxygen in the air is needed for burning. 

As there are so much shortage of oxygen, we should not pollute our environment and grow more trees.  

P26 - Waste Paper Pen Stand

Hello everyone,

My school summer break has started so I decided to do some craft.  

Today I created a waste paper pen stand.
 

What you need:

• Waste Papers
• Glue
• Scissor
  

Here are the photos and video of how I made it.

 

 

Hope you like this pen-stand. Please share if you like it and let me know if you make one.

- Praganya

P25 - Do you think air occupies space?

Me and my mother were thinking what to do today. My mother suggested shall we do an experiment? I told "Yes, that is a good idea." 

 

Then she asked, "what do you think, does air occupies space?" I said, "No, air does not occupy space."

 

Then we did an experiment to learn about it.

 

 What all things we need:

-  A big bowl

- A glass 

- Tissue paper

- Water

Steps:

1. Scramble the tissue paper and put it inside the glass. 

2. Turn the glass and put it straight in the bowl.

3. Take the glass out without turning.

4. Take out the tissue paper and check if it is wet or not.

The tissue did not get wet because half of the glass was filled with tissue paper and half of the glass was filled with air. That is why when we put the glass upside down into the bowl without moving it, the water did not get the space to get in as it was already filled with air.

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- Praganya Deepti Pradeep (8 years)