Fission

The last 200 years our energy has come from burning fossil fuels. Unfortunatly this is going to run out. We need renewable resources, like fission. Fission is the least devoleped of these. Figure one is a fission reaction. Fission doesn't pollute the envoirment like fossil fuels do. They use fission or fussion to power hybrid cars. It provides free energy for the future. They also have nuclear power plants but these release nuclear waste which is harmful to the envoirment.These are usually near big bodies of water. Fission also can help combat global warming. To make fission they contain the reaction in a magnetic field.Fission that powers electricity does not cause polutants in the air, unless their is an accident, which creates nuclear waste. The dictionary definition of fission is, the act of cleaving or splitting into parts.

When a stray nuetron hits a 235u nucleus it makes the 235u unstable, then the 235u nucleus splits apart to form two 235u nuclues's. You may be asking, where does the energy come from? The mass of the atom is converted into energy. Most scientists make a chain reaction of fission. They put many 235u nucleus's together and shoot one nuetron into them. The nuetron hits a 235u then splits into three. They just keep going and going. Figure 2 is a nuclear fission chain reaction. A fission bomb has been created, also known as thermonucleur bombs. Fission bombs aren't very effective, although it has been created. December 2, 1942, underneath the West Stands of Stagg Field at the University of Chicago scientists led by Enrico Fermi created man's first controlled nuclear chain reaction. America's $2 billion project to harness atomic energy.the postwar public was largely ignorant of its history. The splitting of an atom releases an incredible amount of heat and **gamma radiation**, or radiation made of high-energy photons. The two atoms that result from the fission later release **beta radiation** (super fast electrons) and gamma radiation of their own as well. The energy released by a single fission comes from the fact that the fission products and the neutrons, together, weigh less than the original U-235 atom. The difference in weight is converted directly to energy at a rate governed by the equation **E = mc****2**. The decay of a single U-235 atom releases approximately 200 MeV (million electron volts). That is a lot of electricity. So many, in fact, that a pound of highly enriched uranium as us­ed to power a nuclear submarine is equal to about a million gallons of gasoline.Fission is one of the only renewable recourse in the world.Nuclear fission of fusing atoms or fissioning them.This is the formula for it But the bad thing about nuclear fission is it leaves radiation in the air and in the ground.That is bad for crops and will make you very sick.British researchers say those exposed to intense, high doses of radiation may pass genetic changes on to future generations. Scientists studied mice exposed to brief but extremely high levels of radiation. They exposed male mice to fission neutrons and mated them with unexposed females. Their offspring were then mated with other normal mice. They found the grandchildren of these rodents were six times more likely to have genetic mutations. The first generation of mice carried differences in their sperm or ova. These were passed on to their children. The variances cause instabilities in the repeated sequences of DNA in the offspring. The researchers say their findings may have implications for humans, even though people are often exposed to smaller doses of radiation over a long period of time. Scientists don't know whether this type of exposure can produce the same kind of results as in the mice study. But they point out that the study raises the issue of delayed genetic risk. Scientists say the mice were exposed to extremely high levels of radiation — similar to those in the Chernobyl disaster. [].
 * 235 U + 1 neutron [[image:http://library.thinkquest.org/17940/texts/images/arrow.gif width="17" height="13" caption="->"]] 2 neutrons + 92 Kr + 142 Ba + ENERGY
 * 235 U + 1 neutron [[image:http://library.thinkquest.org/17940/texts/images/arrow.gif width="17" height="13" caption="->"]] 2 neutrons + 92 Sr + 140 Xe + ENERGY.