Yesterday there was a fire drill during first period... I used that time for impromptu shell quizzing to see how well the students knew their shells so far. Everyone had a good time and earned a few stickers while enjoying the sunshine.
We spent some time discussing sea shells and learning their adaptations. Then we talked about pearls. Pearls can be made by any mollusc that has a shell. I passed around my pearls and some shells that I have with pearls on the sides - not all pearls are free floating - they can be attached to the side of a shell. A mollusc makes a pearl to cover an irritating spot like a piece of sand that gets inside the shell.
more later
Polar Vs NonPolar Covalent Bonds
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Anyone who has ever had to share something with someone else knows that
sometimes isn't exactly even. Covalent molecules or bonds are no different.
If a ...
6 years ago
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