Cirrus Clouds

Cirrus clouds are a type of high-level cloud that are thin, wispy, and often have a feathery appearance. They form at altitudes above 20,000 feet and are composed of ice crystals. Cirrus clouds are often associated with fair weather, but they can also indicate the approach of a change in the weather.

Formation of Cirrus Clouds

Cirrus clouds form when moist air is lifted to high altitudes where the temperature is below freezing. The water vapor in the air then undergoes deposition, transitioning directly from vapor to ice crystals without passing through the liquid phase. These ice crystals then form the thin, wispy strands that characterize cirrus clouds.

Characteristics of Cirrus Clouds

Some key characteristics of cirrus clouds include their high altitude, feathery appearance, and association with fair weather. They are often seen in the sky as delicate, wispy streaks, and may also form halo formations around the sun or moon.

Study Guide

Here are some key points to remember about cirrus clouds:

1. Cirrus clouds are high-level clouds found at altitudes above 20,000 feet.
2. They are composed of ice crystals and have a thin, wispy appearance.
3. Cirrus clouds are associated with fair weather, but can also indicate an approaching change in the weather.
4. They form through the process of deposition, where water vapor transitions directly to ice crystals at high altitudes.
5. Cirrus clouds may also create halo formations around the sun or moon.

Remember to observe the sky on a clear day and look for the delicate, feathery cirrus clouds high above!

[Cirrus Clouds] Related Worksheets and Study Guides:

• The SkyScience • First Grade