(a) Explain how
(i) lithium atom becomes positively charged
(ii) oxygen atom becomes negatively charged

(b) (i) What is potential energy?
(ii) A coconut of mass 2 kg is on a tree 5 m tall. Determine the potential energy of the coconut at this height [Take g = 10 ms–2]

(c) State four causes of teenage pregnancy
(c) State four uses of soil in agriculture.