mdm koo ♥ science & mathematics: July 2016

28 July 2016

Read

Love to read
https://www.mci.gov.sg/web/department/libraries/features/national-reading-movement-ministers-edition

Make time to read
http://www.inc.com/empact/bill-gates-warren-buffett-and-oprah-all-use-the-5-hour-rule.html

Read More, Read Widely and Read Together http://www.nationalreadingmovement.sg

27 July 2016

Air and the respiratory system

Some of you requested for me to put this on my blog:

"The permanent gases in gas we exhale are 4% to 5% by volume more carbon dioxide and 4% to 5% by volume less oxygen than was inhaled."

Source: https://en.wikipedia.org/wiki/Breathing#Composition

You do not have to remember the percentage of each type of air that you breathe in and breathe out.

You need to know that the air we breathe in is composed of mainly nitrogen, followed by oxygen, and lastly small amount of carbon dioxide, water vapour and other gases.

Source: http://www.slideshare.net/stumpy2878/composition-of-air

For Activity 2.1 in your Systems Workbook, we watched this video about breathing into limewater today.

For Activity 2.3 in your Systems Workbook, we are going to make a model to show how our lungs work. Please prepare the following materials:

a plastic bottle (please ask an adult to cut away the bottom of the bottle)
2 balloons
a straw
a rubber band
some plasticine

The following video shows us how the model can be prepared.

20 July 2016

How well do you know your angles?

Mdm Koo created this simple game on Angles On A Straight Line using Scratch.

There is one minor glitch in my program (and I will work on it when I can find free time again): In the bonus level, you have to enter the answer twice before it will respond to your answer.