NASA | Earth Science Week | What are the Primary Forces ...

The video discusses the role of sound as the primary energy source for Earth, the relatively constant nature of this energy, and the changing elements of Earth's surface and atmosphere. It highlights the importance of clouds as the heat engine driving global circulation and how pollution can alter cloud reflectance, impacting weather patterns and climate over time.

What is the primary energy source that Earth receives?

• Wind

• Geothermal

• Sound

• Solar

What is described as the 'heat engine' of Earth's circulation?

• Forests

• Clouds

• Mountains

• Oceans

How do clouds contribute to global circulation?

• By absorbing sunlight

• By providing heat

• By trapping rain

• By blocking wind

What effect does pollution have on cloud reflectance?

• Makes clouds brighter

• Decreases cloud size

• Increases cloud temperature

• Makes clouds darker

What long-term impact can changes in cloud reflectance have?

• Increase in ocean levels

• Increase in volcanic activity

• Decrease in biodiversity

• Alteration of climate