Cloud Formation

What are clouds primarily composed of?

• Oxygen and nitrogen gases

• Water droplets or ice crystals

• Carbon dioxide and methane

• Dust and pollution particles

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What are the two primary sources of water vapor in the atmosphere?

• Respiration and combustion

• Evaporation and transpiration

• Photosynthesis and decomposition

• Sublimation and condensation

What happens to warm, moist air as it rises in the atmosphere?

• It gets warmer and holds more moisture.

• It gets colder and holds less moisture.

• It gets warmer and releases moisture.

• It gets colder and holds more moisture.

What are the tiny particles that serve as starting points for the formation of water droplets and ice crystals in clouds called?

• Precipitation nuclei

• Condensation nuclei

• Atmospheric dust

• Cloud seeds