| Online Learning:
Online Discussions
The heart of the online course is the discussion forum. The forums are
- interactive and integral to the course.
- organized into small groups of 5-7 people
- asynchronous, you don’t have to be online at specific times
- a lively, interactive place to get to know your colleagues
It is in the forums that you report your analyses, posit explanations, and bring
your questions. The feedback given and received in your group is what pushes
ideas further and brings understanding to the next level.
The facilitator assists each group by focusing the discussion on data, posing
questions to encourage analysis, and providing feedback on the group's work as a
whole.
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Discussion Forum - Ice Investigation
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Author: BJC Date: 9/15/04 5:38PM
Subject: Quantitating Temp. Change
There was an initial drop in the temperature of the water at both the top
and bottom of the glass. The temperature gradually started separating out.
At 9 minutes, the water was colder at the bottom and warmer at the top.
After several house the temperature was the same throughout. This proves
that cold water is denser than warm water.
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Author: WF Date: 9/15/04 10:06PM
Reply to: Quantitating Temp. Change
I did a test to see if just the food coloring alone sinks to the bottom
even if it is the same temperature. So maybe density is not the only
factor?
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Author: JAL Date: 9/16/04 1:22PM
Subject: Evidence of convection?
I think that in a larger container we would not have seen the blue heading
back to the top of the class. I am not convinced that this is convection,
but some sort of artifact of the warmer bottom water getting pushed to the
top in a small space.
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Author: DLM Date: 9/17/04 7:42PM
Reply: Evidence of convection?
OK, so I think the assumption is that temperature corrleates with density.
So how could we measure the temperature to figure out if convection
is occurring or not?
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