Sleet: Definition and Formation
Sleet is a form of precipitation that occurs when raindrops freeze into small ice pellets before reaching the ground. It is commonly observed during winter weather conditions, particularly when the air temperature is near freezing. Sleet is different from freezing rain, which falls as liquid rain and freezes upon contact with surfaces, creating a layer of ice.
Formation Process
Sleet forms when a layer of warm air exists between layers of cold air. As snow falls through the cold air layer, it melts into rain. The rain then passes through a shallow layer of cold air near the ground, causing it to refreeze into ice pellets before reaching the surface.
Study Guide for Sleet
- Formation Conditions: Understand the atmospheric conditions required for sleet formation, such as the presence of warm and cold air layers.
- Differences from Freezing Rain: Differentiate sleet from freezing rain by understanding the distinct processes that lead to their formation.
- Impact on Travel: Learn about the impact of sleet on travel and road conditions, as well as its potential dangers.
- Precautionary Measures: Study the precautionary measures individuals can take to stay safe during sleet events, such as driving carefully and using appropriate footwear.
- Environmental Effects: Explore the environmental effects of sleet, including its influence on plants, animals, and infrastructure.
- Forecasting Sleet: Gain an understanding of how meteorologists forecast sleet and the tools they use to predict its occurrence.
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Worksheet/Answer keyWorksheet/Answer keyThe resources above cover the following skills:
Concepts of Physical Science (SB1, SB2, SB3, SB4)
The student demonstrates an understanding of the structure and properties of matter by describing atoms and their base components (i.e., protons, neutrons, electrons).
The student demonstrates an understanding of the interactions between matter and energy and the effects of these interactions on systems by recognizing that atoms emit and absorb electromagnetic radiation.
Concepts of Physical Science (SB1, SB2, SB3, SB4)
The student demonstrates an understanding of the structure and properties of matter by using the periodic table to describe atoms in terms of their base components (i.e., protons, neutrons, electrons).