Friday, April 16, 2010

Salt Ponds by Philip Frank

Salt ponds are used to create electricity in an interesting way. As the temperature of a water rises, the water is able to dissolve more salt. This makes the volume more, so the water goes to the bottom. Then, the cold water at the top insulates the hot water down in theur naturally. What the salt pond basically does is to collect solar thermall energy. This energy could be collected and made into electricity to power a house. with the correct size, you could power your house easily.

Monday, April 12, 2010

The power of pesticides

by Hezikia

They are the subtle killer of animals even though their main target is bugs.

They are also almost single handedly responsible for the near extinction of the Perigrin falcon in the 1980's.
They are pesticides.

Although rules and regulations have been improved they are still casuing particular damage in other countries who have no alternative to it. Not only are they killing birds but also fish and other marine life when they get sprayed on crops near the ocean. Then marine plants get infected with it which goes onto the fish up the food chain eventually to us. Efforts in other countries are being made to stop this.