Clouds and Their Mysteries

Why do clouds, despite their heavy water content, not fall from the sky?

• They are lighter than air.

• They are buoyant due to warm air.

• They are held up by strong winds.

• They are made of solid ice.

What is the primary process that leads to the formation of clouds?

• Absorption of sunlight

• Melting of ice caps

• Evaporation of ocean water

• Condensation of water vapor

What keeps clouds from falling back to the ground after they move away from warm updrafts?

• They are lighter than air.

• They are tethered to the ground.

• Condensation releases heat, keeping them aloft.

• They are pushed by the wind.

What unusual experience did Lt. Col William Rankin have with a cloud?

• He discovered a new type of cloud.

• He parachuted into a storm cloud.

• He lived inside a cloud for a week.

• He flew through a cloud without a plane.

What percentage of cloud condensation nuclei can be made up of living bacteria?

• 20%

• 10%

• 5%

• 30%

What does the term 'bodies without surface' refer to in the context of clouds?

• Clouds are invisible.

• Clouds are made of ice.

• Clouds have no defined surface.

• Clouds are solid objects.

What is the significance of the Apollo 17 photograph of clouds?

• It proved clouds are made of water.

• It was the first color photo of clouds.

• It started a new environmental movement.

• It showed clouds from a new angle.

What is the 'circle of life' concept related to clouds?

• Clouds never change.

• Clouds are static and unchanging.

• Clouds are only temporary.

• Clouds form, rain, and reform in a cycle.

What does Gavin Pretor-Pinney suggest to better appreciate clouds?

• Read about clouds in books.

• Draw pictures of clouds.

• Watch clouds from a plane.

• Lie on your back and look up at them.

What is the main theme of Gavin Pretor-Pinney's book, 'The Cloudspotter’s Guide'?

• Clouds are dangerous.

• Clouds are boring.

• Clouds are unpredictable.

• Clouds are fascinating and worth appreciating.