I chose this video because i think it gives a very detailed explanation on uranium enrichment.

http://en.wikipedia.org/wiki/Uranium

This is a very well written wikipedia article on Uranium. it includes information on uranium 235, 238, and 239

        Decaying Animal Pollution

        Decaying Animal Pollution can be a big problem when there is a large amount or large dead animal in a small water system. This is especially dangerous in a stagnant water system. A decaying animal contains potentially a lot of diseases or bacteria. Drinking water that has been infected with decaying animals is potentially harmful. It is not a large problem long term however as it can easily be removed and the water can be sterilized.

                                  Clouds!!

                                                                              By: Alina Jenkins and Samuel Clegg

Clouds are great in finding out what the weather might be today, because clouds form in different ways and each one of them has there own kind of weather. Clouds are condensed water vapor that exists in the sky. In order for clouds to form, the sky must have a little bit of dirt or dust for a vapor cloud to form. With this, rainwater is not completely clean. When the water vapor droplets collide, they form larger water droplets, when the droplets get to big, they fall to the ground as precipitation. Many lakes or rivers including reservoirs rely on rainwater to provide the amount of water they need. As humans, we rely on the reservoirs to supply us with water. 

In the picture above, it shows the water cycle in full detail and colour. Water evaporates mainly from the ocean and water vapour rises high into the sky, until it condenses. The water condenses into a cloud. For some clouds they have so much water that they have to let it go by using precipitation, or in other words rain. When it reaches the ground it often goes right back into the water cycle, and then it goes from the top again and again.  

Lastly we hope you would not mind watching some videos we found, thanks to youtube, about clouds. To give you a better understanding and a better picture of the beauty of clouds.

 References:

http://www.wxdude.com/page9.html

Plasma is the fourth state of matter. Plasma is not as   common as the other states of matter. Plasma can be found in places such as flourescent lights, stars, and lightning strikes. Plasma cutters are a tool that canbe used to cut metal. They have been around since world war 2. A plasma cutter works by sending pressurized gas through a channel and then, ther is a negative electrode in the channel, the electrode makes a corcuit when touched and the circuit will make a spark that will heat the gas to over 16,00 degrees celsius thus turning into plasma, the plasma is fired at the metal and the metal is melted.