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Describe, with the aid of a labelled diagram, how frontal rainfall occurs. - Junior Cycle Geography - Question 2B - 2019
Question 2B
Describe, with the aid of a labelled diagram, how frontal rainfall occurs.
Worked Solution & Example Answer:Describe, with the aid of a labelled diagram, how frontal rainfall occurs. - Junior Cycle Geography - Question 2B - 2019
Step 1
Diagram
Answer
To illustrate frontal rainfall, draw a labelled diagram. Start with two air masses: a warm air mass (light and less dense) and a cold air mass (heavy and more dense). Show them meeting at a front, where the warm air is forced upwards over the cold air. Label key components such as the cold front, warm front, and the zone of lifting.
Step 2
Description
Answer
Frontal rainfall occurs when two different air masses converge. The warm air, which is lighter, rises above the cold air mass, which is heavier. As the warm air ascends, it cools. The cooling process leads to condensation of water vapor in the air, forming clouds. The moisture in the clouds continues to accumulate until it falls as rain. Important notes include:
- Meeting of Air Masses: This is crucial as it sets the stage for frontal rain.
- Warm Air Rising: The process of the warm air being forced upwards is essential for rain formation.
- Cooling and Condensation: As the warm air rises and cools, it reaches its dew point, and condensation occurs, contributing to cloud formation and eventual precipitation.
By detailing these processes in conjunction with your diagram, you will provide a comprehensive response to how frontal rainfall occurs.