Article: Cloud categories. (Hands-On Activity).

Clouds are categorized by their height in the troposphere (atmospheric layer closest to Earth's surface) and their appearance. The three basic categories are low-, middle-, and high-level clouds. Clouds at different altitudes don't just look different--they are different. Find out how.

You Need: pencil * pen * color pencils (dark gray, light gray, light blue) * eraser * research material on clouds (from library or Internet) * "Global Warming: Cloud Patrol" (p. 21)

To Do:

1. Review "Global Warming: Cloud Patrol" (p. 21).

2. Select two low-, two middle-, and two high-level clouds.

3. Research the altitude, composition, and ...

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