Fission And Fusion
Bayani Gaba-gaba
Burning coal releases the energy stored in chemical bonds between atoms. Nuclear reactions reach far deeper, into the nucleus itself, and release something like a million times more energy from the same mass of fuel. Two quite different nuclear processes do this, and confusing them is the classic error in this topic.
This lesson separates them properly. Fission splits one heavy nucleus into two lighter ones and runs every nuclear power station on Earth. Fusion joins light nuclei together and powers every star in the sky. You will meet the chain reaction, the job of the control rods and the shielding, and the reason fusion is so much harder to achieve on Earth than in the Sun.
Manufura
- Know that nuclear reactions, including fission, fusion and radioactive decay can be a source of energy
- Understand how a nucleus of U-235 can be split (the process of fission) by collision with a neutron, and that this process releases energy as kinetic energy of the fission products
- Know that the fission of U-235 produces two radioactive daughter nuclei and a small number of neutrons
- Understand the role of shielding around a nuclear reactor
- Know that fusion is the energy source for stars
Takardar Darasi
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Nazarin Darasi
Barka da kammala darasi akan Fission And Fusion. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
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- Nuclear fission is best described as: A) Two light nuclei joining together B) A large nucleus splitting into two smaller nuclei C) A nucleus emitting an alpha particle D) An electron being knocked out of an atom Answer: B
- Which process is the energy source of the Sun? A) Fission of uranium B) Burning of hydrogen C) Fusion of hydrogen nuclei D) Radioactive decay of radon Answer: C
- What starts the fission of a uranium-235 nucleus? A) The absorption of a neutron B) The emission of a gamma ray C) Heating the fuel rod D) The absorption of an electron Answer: A
- In a reactor, the purpose of the control rods is to: A) Slow the neutrons down B) Absorb neutrons C) Absorb gamma radiation D) Increase the fuel temperature Answer: B
- Most of the energy released in a fission reaction appears as: A) Kinetic energy of the fission products B) Sound energy C) Light from the fuel rods D) Electrical energy in the core Answer: A
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