The hatch experiment might not have been successful this year, but Year 8 brine shrimp bottles have worked beautifully.
What’s quite nice is that there is an initial algal population boom – the bottles go dark green – and then, as the shrimps hatch and eat and grow, the bottles become clearer and clearer. I wonder if this could be measured with a colorimeter over time? It’s certainly a great discussion point. And makes up for the failed hatch experiment which I will be trouble shooting in a week or so.
And this exercise was a joyous success.
– going on an African savannah Safari and creating a food web from the animals they see, identify and research on the i-pads.
Next year, rather than have them all do the same thing, I plan to have 5 or 6 different ecosystems (Rain forest, coral reef, pond, er…..) and they can present to the rest of the class. Having built the food web, work in a perturbation exercise. Insecticides wipe out all the oxpeckers – what happens? The ivory trade exterminates the elephants. What happens? Sleeping sickness annihilates the zebra -what happens? Global warming kills the grass – what happens? And so on.
Was pleased and somewhat surprised by how much they enjoyed it!