Predicted Paper

Question 1

Explain why nuclear fusion is more difficult

Answer 1

Fusion needs to happen with more energy and higher temperature in order to overcome the electrostatic repulsion of the nuclei

Question 2

What is a control rod used for in nuclear fission

Answer 2

To absorb neutrons released by nuclear fission. Can be raised or lowered. If lowered, more neutrons are absorbed, slowing down chain reactions and producing less energy output

Question 3

What does the graphite core do

Answer 3

Graphite slows down neutrons so they are more likely to be absorbed