Worms

-Worms are invertebratesthat usually have long, soft, slender bodies.
-The soft bodies of the worms means that they do not make good fossils.
-They were among the erliest multi-celled animals to live in the prehistoric seas.

A short note on what we breathe.

We breathe in:
78% of nitrogen
21% of oxygen
1% of other gases like water vapour/
carbon dioxide/inert/carbon monoxide.
This is what we breathe in every time!!!

About dry ice

Dry ice is solid carbon dioxide.
If you ever had a chance to handle dry ice,you would
sure wear haevy gloves.The super cold surface temperature
can easily damageyour skin if you directly touch it.For
the same reason,you would never want to taste or swallow
dry ice either.Dry ice is actually frozen carbon dioxide.(co2)
To make dry ice,co2 is compressed.

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