Which mid-level cloud is known for forming a light sheet that lets the sun or moon appear as a bright spot?

Which mid-level cloud is known for forming a light sheet that lets the sun or moon appear as a bright spot?

• A. Cirrocumulus
• B. Cumulonimbus
• C. Altostratus
• D. Fog

Answer: (C)

Mid-level clouds that form a nearly continuous veil across the sky can blur bright light sources while still revealing a distinct sun or moon disk. Altostratus fits this pattern: it appears as a gray to bluish sheet that covers much of the sky, often signaling an approaching front. When the layer isn’t too thick, the Sun or Moon may show through as a bright spot seen through the veil, rather than a clearly defined disk. This distinguishes altostratus from other options: Cirrocumulus are high, small patchy puffs that don’t form a uniform sheet; cumulonimbus is the tall, thunderstorm cloud; fog is a ground-based cloud that typically obscures the sun rather than producing a bright disk through a mid-level veil.

Mid-level clouds that form a nearly continuous veil across the sky can blur bright light sources while still revealing a distinct sun or moon disk. Altostratus fits this pattern: it appears as a gray to bluish sheet that covers much of the sky, often signaling an approaching front. When the layer isn’t too thick, the Sun or Moon may show through as a bright spot seen through the veil, rather than a clearly defined disk. This distinguishes altostratus from other options: Cirrocumulus are high, small patchy puffs that don’t form a uniform sheet; cumulonimbus is the tall, thunderstorm cloud; fog is a ground-based cloud that typically obscures the sun rather than producing a bright disk through a mid-level veil.