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Nuclear physics – fission and fusion

By | 2018-04-24T11:58:42+00:00 August 17th, 2017|Physics|

Atomic bomb explosions make a "mushroom cloud" - this is a fission reaction Nuclear physics is the process of getting energy from the nucleus of an atom. There are two ways to release energy from atoms: fission and fusion. Fusion happens all the time in nature, mostly inside stars because fusion needs lots of heat or gravity to get it going. Fusion works with the [...]

Nuclear fusion – Simple Physics

By | 2018-05-31T11:49:26+00:00 August 17th, 2017|Physics|

The Sun shining from space Fusion reactions are how the first stars got started. Soon after the Big Bang, hydrogen atoms began bumping into each other and merging into one bigger heliumatom. Four atoms with four nuclei - centers - mixed together into one atom with a bigger nucleus. But each time this happened there was a bit of energy left [...]

Nuclear fission – Physics

By | 2018-05-31T11:49:26+00:00 August 17th, 2017|Physics|

Nuclear fission: Atomic bomb explosions make a "mushroom cloud" Fission reactions are the kind of nuclear reaction we use for nuclear power plants and nuclear submarines, and also to set off a nuclear bomb. With fission reactions, you take very large atoms like uranium and plutonium and smash them apart into smaller atoms. Because it takes a [...]

Radioactivity and sunburns – Physics

By | 2018-04-24T12:26:12+00:00 August 17th, 2017|Physics|

Radiation from the sun caused this sunburned back The most common kind of radiation is sunlight, and the most common cause of injury from radiation is a sunburn. Just like radioactivity from a nuclear explosion, radiation from the sun can damage the DNA of your cells. Later the same day, or the next day, your skin may be red and sore. [...]

Nuclear fusion project – Physics

By | 2018-05-31T11:49:26+00:00 August 17th, 2017|Physics|

Build your own model of a fusion reaction: start with a regular red lego (a proton). Wrap a rubberband around it to be the strong nuclear force. Then connect a small blue lego (an electron) to the red lego to make a hydrogen atom. Make four of these hydrogen atoms. Now imagine that your hydrogen atoms are being heated up [...]

World War II – history of Europe

By | 2017-08-06T08:29:19+00:00 August 6th, 2017|History, Modern Europe|

Unemployed people in Germany (1930s) The Depression left everyone in Europe feeling angry and upset, because so many people were poor. People were especially upset in Germany, where they also were angry about losing World War I. Many German people looked for someone to blame for their problems. Some Germans blamed Jews, because they were outsiders, and [...]