Author: nur huda

Science educator in a secondary school in Singapore. Loves science, teaching, travelling and craft work.

Electricity experiments tutorial

Experiments on the topic of experiments can be tricky because there are just a lot of variables that can affect the brightness of bulbs.

I’ve made 3 videos for this. Results are not shown in the earlier part of the video, so students will still have to carry out the experiment to record the results.

Effect of number of bulbs, arranged in series, on brightness of the bulbs.

Effect of number of batteries, arranged in series, on brightness of the bulbs.

Effect of number of bulbs, arranged in parallel, on brightness of the bulbs.

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Lesson on haze or air pollution

Demonstration set of haze/ air pollution

Creating haze in a beaker.
1. Measure and prepare aluminium foil to cover beaker.
2. Light up wooden splint and drop it into a beaker.
3. Cover with aluminium foil.
4. Place ice on it.

Possible extension:
Use white paper towel to wipe the inner surface. Students will be able to observe very fine soot

Possible changes, use leaves and soil as a close set-up to forest. But didn’t work too well when I tried. Leaves must be really dry to burn/catch fire.

Egg membrane paper ball

Egg membrane paper ball (my students said it looks like ping pong ball and they can toss it around.

1. Poke thru 2 holes using optical pin, one at the top and another at the bottom
2. Students chip off for a slighlty bigger hole (not too big!)

3. Remove egg content by draining it through the hoke or blowing thru it using a straw (straw need not be thru the hole, can place it just above.

4. Place egg in a beaker containing HCl. Use glass rod to ensure egg doesn’t float.

5. After 5min, discard off HCl. Place egg on petri dish. Gently tap the shell to crack it.
6. Pick up the membrane and rinse it.

7. Blow through it using straw so it inflate. Simply place the straw above the hole.
8. Roll it in talcum powder.
9. Allow it to dry.

Super blood blue moon

The 3 moons in one night, that last happened 1866.

Supermoon: it will be closer to the Earth than usual

Blood moon: occurrence of lunar eclipse. Referred to as blood moon due to red hue during lunar eclipse

Blue moon: occurrence of the 2nd full month

And… The moon shines again after total eclipse.