Nuclear Fission and Fusion
Physics ⇒ Modern Physics
Nuclear Fission and Fusion starts at 11 and continues till grade 12.
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A nuclear reactor uses a moderator. What is the purpose of the moderator?
Describe the main difference between nuclear fission and nuclear fusion.
Describe what is meant by a chain reaction in the context of nuclear fission.
Explain the role of control rods in a nuclear reactor.
In a typical nuclear fission reaction, which of the following particles is commonly used to initiate the reaction? (1) Proton (2) Neutron (3) Electron (4) Alpha particle
Which isotope of uranium is commonly used as fuel in nuclear reactors? (1) Uranium-235 (2) Uranium-238 (3) Uranium-233 (4) Uranium-234
Which of the following best describes nuclear fission? (1) The splitting of a heavy nucleus into two lighter nuclei (2) The combining of two light nuclei to form a heavier nucleus (3) The emission of alpha particles from a nucleus (4) The conversion of a neutron into a proton
Which of the following best explains why a fusion reactor is more difficult to achieve than a fission reactor? (1) Fusion requires higher temperatures (2) Fusion produces more radioactive waste (3) Fusion uses rare elements (4) Fusion is less efficient
Which of the following is a common fusion reaction in the Sun? (1) Deuterium + Tritium (2) Deuterium + Deuterium (3) Hydrogen + Hydrogen (4) Proton-Proton chain
Which of the following is a major challenge in achieving controlled nuclear fusion on Earth? (1) Lack of fuel (2) Containment of high-temperature plasma (3) Excessive radioactive waste (4) Low energy output
Which of the following is NOT a product of the nuclear fission of uranium-235? (1) Krypton-92 (2) Barium-141 (3) Neutron (4) Helium-4
Which of the following is NOT a requirement for a sustained nuclear fusion reaction? (1) High temperature (2) High pressure (3) Presence of a moderator (4) Sufficient fuel density
Fill in the blank: In a nuclear fission chain reaction, each fission event releases additional __________ that can induce further fission.
Fill in the blank: The isotope of hydrogen with one proton and one neutron is called __________.
Fill in the blank: The loss in mass during a nuclear reaction is converted into __________ according to Einstein’s equation E = mc2.
Fill in the blank: The minimum mass of fissile material required to sustain a chain reaction is called the __________ mass.
True or False: Both fission and fusion reactions can be used to generate electricity in power plants.
True or False: Fusion reactions require extremely high temperatures to overcome the electrostatic repulsion between nuclei.
True or False: Nuclear fusion is the process that powers the Sun.
True or False: The energy released in a single fusion reaction is always greater than that in a single fission reaction.
