Here are the answers to the discussion topics for unit 2.  None of this will be on the test but I'm posting it so you can see what I was looking for.

Higgs Boson - click here  

Newfoundland Time Zone - click here  

Weight of an Astronaut - click here  

Tides - click here  

Adjustments in Time - click here

Length of the Seasons - click here

Moving Earth - click here

Gravity inside the Earth - click here