Fission And Fusion
Muhtasari
The nucleus of an atom stores a staggering amount of energy, roughly a million times more than any chemical bond. Two processes can unlock it: splitting a heavy nucleus apart (fission) or forcing light nuclei together (fusion). Both release energy, but they work in very different ways and under very different conditions.
You will learn how uranium-235 is split by neutron bombardment, how the resulting chain reaction is controlled inside a nuclear reactor, and why fusion, the process that powers every star, remains so difficult to reproduce on Earth. The topic also covers the advantages and limitations of nuclear power compared with fossil fuels.
Malengo
- 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
- 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 resulting in a loss of mass 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, due to electrostatic repulsion of protons
Maelezo ya Somo
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Tathmini ya Somo
Hongera kwa kukamilisha somo la Fission And Fusion. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- What is nuclear fission? A) Two light nuclei joining together B) A large nucleus splitting into two smaller nuclei C) A nucleus emitting an alpha particle D) A neutron changing into a proton and an electron Answer: B
- What is the role of the moderator in a nuclear reactor? A) To absorb neutrons and stop the chain reaction B) To slow down fast neutrons so they can cause fission C) To shield workers from radiation D) To cool the reactor core Answer: B
- Which of the following is a product of the fission of U-235? A) Alpha particles B) Protons C) Two or three neutrons D) Electrons Answer: C
- Why does nuclear fusion require very high temperatures? A) To melt the fuel so it can react B) To give nuclei enough kinetic energy to overcome electrostatic repulsion C) To break chemical bonds in hydrogen molecules D) To increase the half-life of the fuel Answer: B
- Which statement correctly compares fission and fusion? A) Fission joins small nuclei; fusion splits large nuclei B) Fission produces more waste; fusion produces very little radioactive waste C) Fusion is used in power stations; fission is not yet viable D) Both require extremely high temperatures to occur Answer: B
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Vitabu Vinavyopendekezwa
Fanya Mazoezi ya Maswali ya Majaribio
Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Fission And Fusion? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
Pakua Programu Kwenye Google Playstore
Kila kitu unachohitaji ili kufaulu katika JAMB, WAEC & NECO.
