[LM_NET] HIT: what is a gas? AND a THANK YOU! :)

["Gray, Patricia" <pgray@FCPS1.ORG>]

Thank you so much to the folks who responded to my question about gas!  I wanted to 
post a HIT just in case there was someone else out there who was curious.  My 
saving grace is that I will probably never meet any of you face to face so although 
somewhat embarrassed about my lack of knowledge I am grateful!  :)
 
Sincerely,
Patricia H. Gray
 
 
HIT:
I would have to say no to the cloud, heat, and smoke being a gas.  A cloud is water 
vapor that has condensed, heat is energy, smoke is a colloid (particles suspended 
in a gas)  The students may think that heat is a gas because they can see the 
convection currents in the air, same with smoke. 

A cloud is water vapor, and that's good enough for second grade. Heat is not a gas. 
Smoke isn't either, but close enough for second grade.

I believe a cloud is moisture molecules, smoke contains fine particulate matter, 
and heat is energy in the way described.

A cloud is water vapor, so it is a gas.  Smoke is a gas with small particles of 
solid in it.  Heat is not a gas, it is energy.


Memory fails me on high school chemistry, but I'm thinking that clouds and smoke 
might be some sort of suspension - water droplets suspended in air for a cloud, and 
solid particles suspended in air for smoke.  Heat
would be a form of energy.  


 
Patricia H. Gray
pgray@fcps1.org
Librarian, Ritchie Elementary
New Baltimore, VA

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