This document discusses different types of air masses and fronts. It defines air masses as large bodies of air with relatively uniform temperature, humidity, and pressure characteristics. The main types of air masses are tropical, polar, maritime, and continental, depending on whether they form over land or ocean in warm or cold regions. Fronts define the boundary between different air masses, and can be cold, warm, stationary, or occluded fronts which form when a cold front overtakes a warm front. Different air masses and fronts influence weather patterns and conditions.

1. 9 th Grade Chapter 3 Lesson 2 Pgs. 56 – 60 (Start at Air Masses) For Student Use Only