Question 1:
Diagram 1 shows a nuclear fission process of radioactive substance.

(a) Name energy S and ray T in the boxes provided in Diagram 1. [2 marks]

(b) State one use of:
(i) Energy [1 mark]
(ii) Ray T in medical field.[1 mark]

(c) State one method to detect the presence of ray T. [1 mark]

(d) What is the effect on human beings if exposed to ray T. [1 mark]

Energy S: Nuclear energy
Ray T: Radioactive radiation


- To generate electrical energy
- To generate large amounts of heat and light in nuclear explosions
(any one)


- Used as radioactive tracers
- Used for sterilising medical supplies
- Used in radiotherapy treatment to kill certain cells such as cancer cells
(any one)

Use a detector such as the Geiger-Muller counter.

Causes radiation sickness, internal bleeding, infertility, cancer and mutations.