A) (i) Three benefits that Ghana could derive from nuclear energy:

Here are the answers to question 3:

a) (i) Three benefits that Ghana could derive from nuclear energy:

• Electricity generation to meet energy demands and support industrial growth.
• Applications in medicine for diagnosis and treatment (e.g., radiotherapy).
• Contributions to scientific research and technological advancement.

(ii) Two types of nuclear radiation:

• Alpha radiation ($\alpha$)
• Beta radiation ($\beta$)

b) The scientific principle involved in each of the following local industries:

(i) Kenkey production: Fermentation

(ii) Soap production: Saponification

(iii) Salt production: Evaporation (or Crystallization)

(iv) Vegetable oil production: Extraction (or Pressing)

(v) Gari processing: Fermentation and Dehydration

c) (i) Two micronutrients in a soil:

• Iron (Fe)
• Zinc (Zn)

(ii) Differentiation between broadcasting and side dressing methods of fertilizer application:

• Broadcasting involves spreading fertilizer uniformly over the entire field or soil surface.
• Side dressing involves applying fertilizer in bands along the sides of rows of growing plants, after they have emerged.

d) (i) Differentiation between conductors and semi-conductors:

• Conductors are materials that allow electric current to flow through them easily due to a large number of free electrons. They have very low electrical resistance.
• Semiconductors are materials with electrical conductivity between that of a conductor and an insulator. Their conductivity can be controlled by doping or external factors, making them useful in electronic devices.

(ii) Two appliances in the home which use semi-conductors:

• Television
• Computer (or Smartphone, LED lights, Microwave oven)