The Hydrosphere


Video Study Guide: Thunderstorms (VK998; 20 minutes)


What is a Meteorologist?


How big is a typical thunderstorm?


What is the troposphere?


What is a thermal?


Why does a cumulus cloud have a flat bottom?


What is required to form a thunderstorm?



Where do the best thunderstorms form?


How does condensation fuel the formation of cumulus clouds?


What keeps water droplets in the clouds?


Why do they finally fall to earth?


What is a "downburst?"


What is lightning?


What causes lightning?


What causes thunder?


Why is thunder a "long low rumble" and not a single "boom?"


What causes tornados?


How do thunderstorms act as "heat pumps?"


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