Mixture and compound

Iron and sulfur - as mixture and as compound (iron sulfide)

Chemical reaction of iron with sulfur to form iron sulfide

And here's a BBC Bitesize link on creating iron sulfide.

Remove distractions while walking

When you walk

• your eyes shouldn't be glued to the tiny screen in your hand.
• your ears shouldn't be plugged with the buds blasting music.

Click above to watch on YouTube what happens when one's walking with dangerous distractions.

Household Energy Consumption in kWh

Why is the joule not used as a unit of the total electrical energy used in an average household?

Joule is a very small unit for household electrical consumption and the numbers will become very large for calculation. It will be more convenient to calculate total electrical energy used in an average household using kWh.

Check out this BBC - GCSE Bitesize link on Practical Electricity - using kWh for household energy consumption.

Compounds

The links of these videos are shared in the sec 1 notes on Chapter 3 - Exploring Diversity of Matter by its Chemical Composition. Here are the YouTube videos on compounds for easy access.

Slide 16 (one video on chemical reaction to form a compound)

Slide 17 (two videos on more chemical reactions to form compounds)

And here's the Periodic Table Song.

Malleability and Ductillity

This video was shown in 1B today when we were going through the differences between metals and non-metals (Chapter 3: Exploring Diversity of Matter by its Chemical Composition).

Reflection on Total Defence Day

THINK BACK

• What is the significance of Total Defence for Singapore?
• Why is Total Defence important?

LEARN FROM IT

• What values and attitudes are essential in keeping Singapore safe and secure?

DO IT BETTER

• As we pursue our personal aspirations, what can we do for our family / school / community for Total Defence?

Please do your reflection in the last two pages of your CCE Reflection Journal.

Updated on 16 February: Did you hear the sirens sound off at 6:20pm yesterday? Do you know why the sirens went off at 6:20pm?

<< Sirens at 6.20pm >>Each year on 15 Feb, we commemorate Total Defence Day. But this year, we are doing something...
Posted by Ng Eng Hen on Sunday, February 15, 2015