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Monday, September 14, 2009


First we read a 2-page spread from a book I have selected. Next, boys do a notebook page. Whenever possible, we try out an activity that demonstrates what was covered in our reading.

Here are a few picture-worthy activities we did...

We learned that light could come from various sources. Looked at how light was produced in a glowing hot wire. Read about how an incandescent bulb works. Set up a simple circuit to see the bulb light up. (You wouldn't believe it, but this is the only incandescent bulb I have at home!)

We read about the various behaviours of light through and on various material. Played with flashlights mirrors and such. (Oooh... lots of excitement here!) After experimenting with lens, we took a look at the physics behind the eye. Here is an interactive site that explains the workings of the eye and how lens can help correct eye defects. (ignore the registration request by clicking on "maybe later")

We tested to see how light travel in a straight line...

See how the angle of reflection is the same as the angle of incident ray...

We split white light into its rainbow colours using our home-made prism (made by taping 3 pieces of microscope slides together, using a plastacine base and filling it with water).

Observed this same phenomenon right in our aquarium that day and wowed at it. Later, we discovered that we get this treat everyday! (Lot of good information on rainbows here.)

We made our own coloured lights to see how colours mix. This was achieved using coloured cellophane papers (red, blue and green), kitchen towel cardboard cores and 2 torches.

Red + Blue = Magenta...

Blue + Green = Cyan...

Red + Green = Yellow...

The tough part about this experiment was that our torches were of different brightness. The "correct" secondary colours would only show up well when the two coloured lights were of about the same intensity. The colours were more obvious when we shine them on a white surface at a very close range. However, my camera could not capture these. The coloured spots turned out overexposed. :-( I decided to post the pictures that had less obvious secondary colours. These were taken with the lights shone from further away. (I am not a professional photographer!)

I was at first tempted to not try this experiment ourselves (and a few other activities also...). Instead, just settle for watching a video clip of a similar experiment done very professionally (or simply reading about them). Then somehow, somewhere, this quote jumped at me as I was deliberating:

"Accept no substitute for fun!"

It was like a wake-up call! I was resolved to not short-change my little guys. Well, ... it is fun for me too. ;-) I am making this our motto for Science from now on!

1 comment:

  1. Wonderful post, Sarah! I am amazed at your creativity! I especially liked the homemade prism. What a touch of genius on your part! Thanks for sharing your wonderful lesson, and inspiring us, lifting us from the "drudgery" of daily "routine" schoolwork :)



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