What is nuclear fission?
The splitting of an atom
The joining of two light nuclei
The splitting of a heavy nucleus
What particle is used to trigger the fission of a uranium nucleus?
A neutron
A proton
An electron
What is a chain reaction?
A reaction that causes a chain made from uranium to split
When atoms of uranium join together in a long chain
When neutrons released from one fission cause further fissions
How is the chain reaction slowed in a nuclear reactor?
By removing the fuel rods
By inserting the control rods
By cooling the reactor down
Why is the reactor filled with graphite?
To speed up the neutrons
To slow down the neutrons
To stop the neutrons