Monday, 7 November 2016

2016 PSLE Question on Carrier Crab and Sea Urchin - Check out this video

In the 2016 Science PSLE, pupils were asked an open-ended question on the carrier crab and sea urchin.

Watch this video (posted on Youtube) to see the carrier crab in action.


Science Concepts:
This is an example of symbiosis or interdependence between the carrier crab and the sea urchin. The carrier crab carries the sea urchin on its back as a spiny shield to protect itself from predators. In return, the sea urchin gets a free ride to new feeding grounds in the ocean so that it can get more food.




2 comments:

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