How air masses influence the climate of ghana

Geologists know that potassium-40 decays to argon-40, with a half-life of 1.3 billion years. if an analysis of a feldspar crystal in a sample of granite shows that 75 percent of the potassium-40 atoms have decayed to form argon-40, what is the age of the granite

Suggest two reasons why irrigation is important for human development of the desert (4 marks)

Which of the following is an example of relocation diffusion