Nuclear Fission & Fusion (AQA GCSE Physics): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What happens during nuclear fission?
What happens during nuclear fission?
Large unstable nucleus splits into 2 parts
Which two atoms are commonly used for nuclear fission?
Which two atoms are commonly used for nuclear fission?
Uranium-235 and plutonium
What must a uranium-235 nucleus absorb before it will split?
What must a uranium-235 nucleus absorb before it will split?
A neutron
How many neutrons are released when a uranium-235 nucleus undergoes fission?
How many neutrons are released when a uranium-235 nucleus undergoes fission?
2-3 neutrons
What are the smaller pieces produced during nuclear fission called?
What are the smaller pieces produced during nuclear fission called?
Daughter nuclei
What is a chain reaction in nuclear fission?
What is a chain reaction in nuclear fission?
Neutrons from 1 fission cause more fissions
What happens in an uncontrolled chain reaction?
What happens in an uncontrolled chain reaction?
Reaction accelerates, releasing energy fast
How do nuclear power stations control the chain reaction?
How do nuclear power stations control the chain reaction?
Special materials absorb some neutrons
In a controlled reactor, how many neutrons from each fission should cause another fission?
In a controlled reactor, how many neutrons from each fission should cause another fission?
One neutron
What is the first step in generating electricity from nuclear fission?
What is the first step in generating electricity from nuclear fission?
Heat water to make steam
Are the daughter nuclei produced in fission radioactive?
Are the daughter nuclei produced in fission radioactive?
Yes, they are radioactive
What happens if too many neutrons cause fissions in a reactor?
What happens if too many neutrons cause fissions in a reactor?
Reaction speeds up dangerously/meltdown