Ping Pong Ball Question

Today, Mavis and Wen Qi wrote me a question.

If a ping pong ball is dented, why does it become round again when we put it in
hot water?

Now, the simple reason is because air expands when it is hot. So, when you put the ping pong ball into the hot water, the air inside the ball expands and pushes out the dents!

Do go read up more about how air expands and what actually happens when air expands. Have fun!!

Thanks for the question, keep them coming!!

The video below shows how to inflat a dented ping pong.

Week 1 of Hydroponics Project

Dear 3/7,

One week has passed since 8 of your friends started growing the vegetable using the Hydroponic system in school. Take a look and see how their "babies" have grown!

Physical Properties of Materials

Dear 3/7,

I'm sure you had fun today testing out the physical properties of different materials. Just remember that there is more than what we've learnt today, so go and explore more into the world of materials and find out what other words can be used to describe materials.

If you have any questions, feel free to ask using the tag box on the right.

There is a website that allows you to do experiments on materials online. Click here for the website.

Have fun!!

Hydroponics Team growing "Pak Choy"

We started on our mission to grow vegetables using hydroponics. Hopefully our vegetables will grow big, strong and healthy! Here are some pictures of the fun we had...

Mr Tan teaching us about hydroponics.

Putting the seedlings into the trays.

Amirah and Tang Wei with the box of seedlings. Looks like sushi!

Moe Thu planting...

Jiamin carefully placing the seedlings into the 'cups'

Jun Feng looks proud of his "babies"!!

Tutorial: How to Embed a YouTube video on your Blog

Hi my dear 3/7...

This is for those who are wondering how to embed (put) a YouTube video on your blog. YouTube is a very interesting website because there is a lot you can learn from there. But just be careful that there are some videos on YouTube that are not good.

Step 1: Go to YouTube and find a video that you want to embed on your blog.

Step 2: Look for a box called Embed on the right of the video.

Step 3: Click inside the code box next to the word Embed. All of the code text should automatically be highlighted. If not, you'll need to select it. Copy this code. You can copy by right-clicking on your mouse and selecting copy from the drop-down menu.

Step 4: Log into your Blogger account and compose a new message for your blog. Select the Edit HTML tab (top right hand side), and paste the code you copied from YouTube. It is important to make sure you have the HTML tab selected first. You can paste the code by right-clicking and selecting paste from the drop-down menu

For more information and pictures that shows how to do it, go to this website.

Have fun!!

Have Fun Looking!!

Today we had supplementary, And we had Fun.

3/7 is the best!

Hydroponics Team Harvesting Vegetables

8 pupils were selected to help in the Hydroponics project for the P3 level. They helped to harvest the first batch of vegetables grown by the vendor using the hydroponics system.

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What is different about hydroponics and normal growing of vegetable using soil?

Hydroponics uses only water. There is no soil involved. All you need is water and nutrients and the vegetable can grow. The whole system is run on solar power which helps to pump water to the plants. So we do not need to water the plants at all. All we need to do is to add nutrients into the water. So simple!!

There is also no pest that attacks the plants and so there is no harmful pest-killing chemicals. It's very healthy and fresh!

Project Work

Project work was the first major activity done by the class. I'm sure you had lots of fun working with your classmates. Remember, unity is strength. Only with friends will you be able to achieve great things!

Here are some pictures taken when the groups were doing their presentation: