Fission And Fusion
Muhtasari
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.
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 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
Maelezo ya Somo
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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.
- 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
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.
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