SOC-468999
1 What is the difference between Fission and Fusion Reactors?
a) Fission and Fusion split atoms b) Fissions splits and Fusion joins atoms c) Fusion joins and Fission splits atoms d) Fission and Fusion join atoms
2What needs to happen for a nucleus of Uranium to fission (split)?
a) The nucleus needs to be bombarded with a proton
b) The nucleus needs to be bombarded by a fast moving neutron
c) The nucleus needs to absorb a slow moving neutron
d) The nucleus needs to be heated up to split 3 What is released when an atom of uranium fissions (splits)?
a) Energy and protons b) Heat energy and light c) Energy and electrons d) Energy and neutrons
4 What can the neutrons released in the fission of a nucleus of uranium do?
a) They can be absorbed by other uranium nuclei and begin a chain reaction b) They can be absorbed by other uranium nuclei and stop the nuclear reaction c) They are all absorbed by the control rods in the nuclear reactor
d) They so fast that they fizzle away outside the nuclear reactor and can harm people 5What are the control rods used for in a nuclear reactor?
a) They slow down the neutrons released by the nuclear fissions of Uranium
b) They absorb some the neutrons released by the nuclear fissions, which slows down the reaction c) They are always inserted all the way down the reaction core to control the nuclear reaction
d) They ensure the neutrons released by nuclear fissions don't escape the reactor by bouncing them back inside 6 What happens in a nuclear fusion reaction?
a) Two nuclei merge together to form a single nucleus of a different element and releasing energy b) A nucleus splits to form two nuclei of different elements and releasing energy
c) Heavy nuclei fuse together to form a larger nucleus of a different element and releasing energy d) Heavy nuclei fuse together to form a smaller nucleus of a different element and releasing energy 7 We need to use really high temperatures and pressure for nuclear fusion to occur because
a) the electrons in the atom repel each other and we need high energies to bring the nuclei close enough to merge b) the electrons in the nuclei repel each other and we need high energies to bring the nuclei close enough to merge c) the neutrons in the nuclei repel each other and we need high energies to bring the nuclei close enough to merge d) the protons in the nuclei repel each other and we need high energies to bring the nuclei close enough to merge 8 The moderator’s role is to
a) Speed up the neutrons to start the chain reaction b) Produce neutrons to make a chain reaction c) Surround the fuel rods to slow down the neutrons d) Decides which nuclear reactions are allowed.
9 What happens to part of the mass of an atom that undergoes nuclear fission?
a) It disappears as it is used up in the reaction b) It is changed into energy
c) It increases to compensate the mass of the products of the reaction
d) It is redistributed, because the mass of the products is exactly the same as the mass of the reactants 10 We are interested in Nuclear Fusion because
a) It is made from renewable readily available resources like sea water.
b) It produces 7 times less energy than Nuclear Fission c) It needs a lot of money to research it.
d) It produces lots of nuclear waste.
