biology

Diffusion and Osmosis using raw egg

Remove shell of raw quail egg by soaking it in Hydrochloric acid or vinegar for a day. Rinse it and place it in various set-up to demonstrate diffusion and osmosis.

From left to right:

Untreated, in distilled water, in red-coloured water, in honey.

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Broken heart

The blue piece had always been loose. And drops easily. Didn’t noticed it drop as I was on my way to class yesterday. Unfortunately, couldn’t find the piece as I retrace my step.

RIP. Had it since my practicum days… time to buy a new one.
Bought this years ago… with other tools for this chapter is a stethoscope (which really works!) and an oxymeter (clipped to finger to measure oxygen level and pulse rate). Those were the days being a young, enthusiastic teacher ūüėõ

Oh, btw this model is the same size of a typical child’s heart.

Flower- Model making with show & tell

Artifacts from a project years ago¬†after I taught them parts of a flower and adaptation of insect and wind pollinated plants. So proud that quite a number of them actually put in so much effort for it. The final products were so good that I placed them on display at the back of the Bio lab. The Bio lab is one of the venue for guests whenever we have school visits, so it’s definitely a good idea to put them on display there.

Their task was to design their own flower using any materials. Then, we had show and tell for them to describe the features of the flower they had created, using ideas of pollination.

Model for respiratory system

This is an activity I usually carry out for lesson on part of respiratory system- Model making using straws.

Straws of various sizes and Q-tips are provided foe them to make the model. Straws that I use are bubble tea straw, regular straw and coffee stirrer.

They simply cut the items and tape them to a large piece of white paper provided.

Here’s a sample of the final product.

Water pollution at Whampoa River

Earlier this year, whitish discharged was reported at Whampoa River.

whampoa-river-whitish

There was no update about it about until today. Investigations by National Environment Agency (NEA) shows that the source of the water pollution is chemical illegally discharged by a construction firm, Singbuild. The firm was fned a total of $7,000 for illegal dumping industrial waste and debris into drains.

This news can be used as materials for lessons on water pollution.

Archived news articles for lesson materials:
Clean-up in Whampoa River after whitish discharge discovered
Singbuild fined $3,000 for pollution Whampoa River
Construction company Singbuild fined $7,000 for illegal dumping and pollution