chemistry week 1

Dear Larry, i'd like to thanx here for sharing all those intense information updated on our planet environment. 
i've attached here what i've seen for the global warming.google search: National Geographic news, Mars melt hints at solar, not human, cause for warming, scientist says, Feb 28, 07

thank Q...muchhh

and for the first quiz, i understand so far of what's the chemical and physical compound... ahh and for sure lots of things i missed out...