So which is heavier? A pound of feathers or a pound of lead?

What a crazy class today!  But I hope you can be comfortable with the temporary confusion--it will lead to understanding and order very soon, probably. I had some technical difficulties with my computer equipment, which didn't help, and I am recovering from my son's wedding.  But also, this is a subject that is best learned through testing and trial and hands-on experience. Keep your head in the game, focus on the subject, and really, really, really listen to instructions.  If I say make a data table, then make a data table before you do the lab work, so you can record as you go.  Most of you should make bigger tables with more room to write in.

Mass - how much stuff
Volume - how much space the stuff takes up
Density - how much stuff is in how much space

Is is tightly packed together?  Is it fluffy like a pillow? These are questions of density.

Here are some videos to enlighten us:

Density Worksheet:   Print out and complete  http://ms.lindenwold.k12.nj.us/ourpages/auto/2011/10/18/45786733/Density%20calculations%20homework.pdf

If you have not yet turned in your Blowgun Lab Report, work on that now according to the Lab Report Guidelines that I handed out.  (not just a page ripped out of your lab book)