Describe the blue ridge mountains.

Plants can have a positive and negative effect on the rate of weathering

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)