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
VSEPR - Valence Shell Ectron Pair Repulsion Theory
-
Valence Shell Electron Repulsion Theory
Electrons do not like each other and when looking at molecular structures -
electrons and unshared electrons (the t...
6 years ago
No comments:
Post a Comment