http://en.wikipedia.org/wiki/Cricket_%28insect%29
The chirping is temperature dependent. I would think that the activity of the cricket increases as temperature increases. (generally true in all creatures). The cricket chirps by rubbing wings together so I don't think there is a chemical reaction; however, the metabolism increases with temperature and metabolism certainly is a chemical reaction.
In cool weather, the number of chirps per minute from crickets diminishes. How can this be explained in terms of rates of reaction?
I'm thinking this is because reactions occur faster in warmer weather than in colder weather but i'm not sure if this effects the cricket's ability to produce a chirp, or the chirps ability to project?
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