We talked about how fish breathe, and oxygen (in the air and dissolved).
Children had found a beautiful dead cicada and an empty cicada-nymph shell. This led to a discussion of metamorphosis. I brought in several insect books which are on display in the classroom. The cicada and shell are at the stereomicroscope for continued examination.
The cicada makes sound with a little organ tucked into the shell of the thorax. It appears to work by a mechanism very similar to the little clicker you noticed at the sign-in table (which is why the clicker is there, of course, because of the cicadas).
Keep the questions coming. It is perfectly legal to write the question at home and bring it to school to drop in the Question Box.
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