Which term describes clouds formed from unstable air and often follows the diurnal cycle of solar heating?

Which term describes clouds formed from unstable air and often follows the diurnal cycle of solar heating?

• A. Direction/speed
• B. A cloud will form
• C. Formed from unstable air, often follows the diurnal cycle of solar heating
• D. Thicker and darker than a stratus cloud

Answer: (C)

Cumulus clouds are formed when the air is unstable and daytime solar heating drives convection. When air is unstable, rising parcels remain warmer than their surroundings, continue to rise, cool, and condense into clouds. This convective process is amplified by solar heating, so cumulus clouds commonly develop in the afternoon after energy has built up near the surface. They typically appear as fluffy, puffed shapes with flat bases and can grow taller if convection remains strong, sometimes developing into larger cumulus congestus or even cumulonimbus if the updrafts become very intense. The other options don’t describe this formation mechanism or the daily heating pattern: direction or speed refers to cloud motion, not type; a cloud forming is too generic; and thickness or darkness relative to stratus describes appearance rather than the convection-driven formation and diurnal cycle.

Cumulus clouds are formed when the air is unstable and daytime solar heating drives convection. When air is unstable, rising parcels remain warmer than their surroundings, continue to rise, cool, and condense into clouds. This convective process is amplified by solar heating, so cumulus clouds commonly develop in the afternoon after energy has built up near the surface. They typically appear as fluffy, puffed shapes with flat bases and can grow taller if convection remains strong, sometimes developing into larger cumulus congestus or even cumulonimbus if the updrafts become very intense. The other options don’t describe this formation mechanism or the daily heating pattern: direction or speed refers to cloud motion, not type; a cloud forming is too generic; and thickness or darkness relative to stratus describes appearance rather than the convection-driven formation and diurnal cycle.