Which altitude range correctly defines the base height for middle clouds?

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Multiple Choice

Which altitude range correctly defines the base height for middle clouds?

Middle clouds form in the mid-troposphere, so their bases sit at roughly 6,500 to 20,000 feet. This range distinguishes them from low clouds, whose bases are near the surface (0 to about 6,500 feet), and high clouds, whose bases are above about 20,000 feet. Examples of middle clouds include altocumulus and altostratus, which typically form within that 6,500–20,000 ft window. Since the base height for middle clouds falls exactly in this range, the option 6,500 to 20,000 ft is the correct one.

Middle clouds form in the mid-troposphere, so their bases sit at roughly 6,500 to 20,000 feet. This range distinguishes them from low clouds, whose bases are near the surface (0 to about 6,500 feet), and high clouds, whose bases are above about 20,000 feet. Examples of middle clouds include altocumulus and altostratus, which typically form within that 6,500–20,000 ft window. Since the base height for middle clouds falls exactly in this range, the option 6,500 to 20,000 ft is the correct one.

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