S is for seashells!
She sells sea shells by the sea shore! (sorry... just had to!!)
I realized when I chose seashells for this week's post that I really didn't know how they are formed! So... I Googled it! (as I often point out to folks, Google is your friend. Learn how to phrase your search correctly and you can find practically anything through Google)
Here's what I found out:
- Mollusks - the creatures who live inside a seashell - are invertebrate animals who use the shells to protect themselves from predators.
- Mollusks ingest salt and chemicals and excrete calcium carbonate which hardens into a shell.
- The shell is not part of the living animal. It is not made of cells, but minerals.
- Different colors in the shells are due to the mollusk's diet! Mollusks living in tropical climates have more of a variety in their diet so their shells are more colorful than mollusks who live in colder climates with fewer food choices.
- Lines and patterns in the shell are due to varying rates of secretion of the calcium carbonate.
photo by wildxplorer