1. Describe the roles that water vapour, carbon dioxide, ozone and particulates (aerosols) play in atmospheric processes. Why are these gasses important with regard to atmospheric processes? 2. Explain land/water contrasts, including the four reasons why land heats and cools faster than water. 3. Describe the general location, movements and characteristics of the following components of the general circulation of the atmosphere: ITCZ, subtropical highs, westerlies, and the trade winds. 4. Describe the global distribution of precipitation. In your answer identify regions of high and low annual precipitation and the reasons why certain regions are arid while other regions of the world experience heavy rainfall annually.