Which two processes lead to cloud formation in rising air? (1) compressing and cooling (2) compressing and warming (4) expanding and warming (3) expanding and cooling

Air rises, expands, cools, reaches the dewpoint, and forms clouds for three reasons…

three reasons… It is “naturally” less dense (hot, wet).

Warm, moist, low pressure, and low density.

This can lead to afternoon thunderstorms.

Which sequence of events affecting moist air within Earth’s atmosphere causes cloud formation? (1) rising → expanding → cooling → condensation (2) rising → contracting → warming → evaporation (3) sinking → expanding → warming → condensation (4) sinking → contracting → cooling → evaporation

three reasons… It is “naturally” less dense (hot, wet). It is forced up by an obstacle.

Air is often forced up mountains.

World’s tallest building This can even happen at tall buildings! Burj Tower, Dubai, UAE World’s tallest building

The other side (LEEWARD) has sinking, compressing, warming air. The side facing the wind (WINDWARD) has rising, expanding, and cooling air. Cool & Wet Warm & Dry The other side (LEEWARD) has sinking, compressing, warming air.

Deserts can be caused by mountain range “rain shadow”.

Deserts can be caused by mountain range “rain shadow”.

(1) cooler and drier (3) warmer and drier The cross section below shows the direction of air flowing over a mountain. Points A and B are at the same elevation on opposite sides of the mountain. Compared to the air temperature and humidity at point A, the air temperature and humidity at point B are usually (1) cooler and drier (3) warmer and drier (2) cooler and wetter (4) warmer and wetter

three reasons… It is “naturally” less dense (hot, wet). It is forced up by an obstacle. It is forced up by more dense air.

Cold, dry, more dense air often “bumps into” warmer, wetter less dense air at a weather front.

Cold, dry, more dense air often “bumps into” warmer, wetter less dense air at a weather front.