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WorksheetsFission and Fusion
Total questions: 12
Worksheet time: 25mins
What is nuclear fusion?
When a uranium nucleus absorbs a neutron.
The coming together of small nuclei to form larger nuclei.
The emission of neutrons from an atomic nucleus.
The breaking apart of larger nuclei into smaller nuclei.
Where does this process normally occur?
Inside the Earth.
Inside a nuclear reactor.
Inside the Sun.
Which is NOT a feature of this reaction?
There is a net release of energy from this reaction.
A lot of energy is released.
A lot of energy is required to start the reaction.
There is a net loss of energy from this reaction.
Which of these is NOT an isotope of hydrogen?
Deuterium
Tritium
Helium
Hydrogen
What are two functions of the 'control rods' in a nuclear reactor?
To control the rate of the chain reaction.
To slow down the neutrons so that they are absorbed by uranium nuclei.
To conduct the heat generated to the water to make steam.
To stop the reaction in the case of an emergency.
What is the correct order of events in terms of how energy is transformed in a nuclear reactor?
nuclear to kinetic to kinetic to heat to electrical
nuclear to kinetic to heat to kinetic to electrical
nuclear to heat to kinetic to kinetic to electrical
What is the name of the particle absorbed by a uranium nucleus in nuclear fission?
(Answer one word, lower case, make sure spelling is correct)
(a)
Which would best describe the initial reaction occurring in a nuclear bomb?
fission, induced
fusion, induced
fission, spontaneous
fusion, spontaneous
In a nuclear reactor the reaction takes place in..
The control rods
The fuel rods
The moderator
The generator
Nuclear fusion produces more energy than nuclear fission per unit mass of fuel used.
What issues are there with fusion power generation?
The isotopes of hydrogen used as a fuel are extremely difficult to source on Earth.
Massive opposition from environmental groups as a result of the nuclear waste produced from the reaction.
Requires extremely high temperatures which are difficult to control and highly expensive.
What features of an atomic nucleus can make it unstable?
Tick 3 boxes.
Being too large
Too many neutrons
Too many protons
Too many electrons
Which of these combinations irradiates a patient the most?
20 chest X-rays
2 CT scans of the chest
A CT scan of the chest and 3 CT scans of the head
