Objective 4:

1.  The warmer particles are bouncing around everywhere because of the energy that the sun is giving out.  This makes them warmer because they have more energy.  The cooler particals don't have as much sun energy causing them to be less bouncy and wild so they get cold.
2.  Ice-cream starts to melt on warm summer days because when it is cold for them feezer the paritcals are just sort of sitting there and not moving around as much but then the sun causes the particals to get energized so they start to heat up causing the ice-cream to melt.
3.  The melting point of particals has a lot to do with the vibration of the particals.  This is because as the particals begin to move around a lot they get a lot hotter causing the object to melt.
4. This happens when it is really humid in the air and then all the sudden it gets cold.  This then makes the air dissolve so then the water is made into little drops of water like on a  hot day and you see condensation on the cup.
http://wiki.answers.com/Q/Why_does_condensation_occur
5.   Sublimation happens when a gas turns to a solid without becoming a liquid.  From the website that follows I got this quote thing explaing it.  "It is shown that the form of the sublimation process in which phase transformation takes place not from the geometric surface but in a certain layer of finite thickness is a stable one."
http://www.springerlink.com/content/qr74408237k73226/