Fission And Fusion
Bayani Gaba-gaba
The energy that powers nuclear reactors and the energy that keeps stars shining come from the same place: the nucleus. Splitting heavy nuclei apart (fission) and squeezing light nuclei together (fusion) both release enormous amounts of energy compared to any chemical reaction.
In this lesson you will learn how uranium-235 undergoes fission, how a chain reaction works, the roles of control rods, the moderator and shielding in a reactor, what nuclear fusion is, why it powers stars, and why achieving fusion on Earth is so difficult.
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 by collision with a neutron, and that this process releases energy
- Know that the fission of U-235 produces two radioactive daughter nuclei and a small number of neutrons
- Describe how a chain reaction can be set up if the neutrons produced by one fission strike other U-235 nuclei
- Describe the role played by the control rods and moderator in the fission process
- Understand the role of shielding around a nuclear reactor
- Explain the difference between nuclear fusion and nuclear fission
- Describe nuclear fusion as the creation of larger nuclei from smaller nuclei, accompanied by a release of energy
- Know that fusion is the energy source for stars
- Explain why nuclear fusion does not happen at low temperatures and pressures
Takardar Darasi
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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.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- In nuclear fission, a heavy nucleus: A) Absorbs light B) Splits into two smaller nuclei C) Fuses with another nucleus D) Emits only gamma rays Answer: B
- The role of control rods in a reactor is to: A) Speed up neutrons B) Absorb neutrons C) Produce neutrons D) Shield workers Answer: B
- Nuclear fusion is the energy source of: A) Nuclear power stations B) Coal-fired stations C) Stars D) Batteries Answer: C
- Fusion requires very high temperatures because: A) Nuclei are negatively charged B) Nuclei are neutral C) Positive nuclei repel each other D) Neutrons need to be fast Answer: C
- The moderator in a reactor: A) Absorbs neutrons completely B) Speeds up neutrons C) Slows down neutrons D) Generates neutrons Answer: C
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
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