1. Explain what is meant by the 'ring of fire' (2 marks) 2. Explain why earthquakes occur along conservative plate boundaries but there is no
volcanic activity. (4 marks)

3. Using a diagram explain what happens at a
divergent plate boundary. (4 marks)

So  if  the sum of the enthalpies of the reactants is greater than the products, the  reaction  will be  exothermic.  if  the products side has a larger enthalpy, the  reaction  is  endothermic. you may wonder why  endothermic reactions, which soak up energy or enthalpy from the environment, even happen

Developed countries will see a decrease in natural resources, because their population will decrease.