How does hail form? First, we need a thunderstorm to develop. As it strengthens, the updraft or vertical wind becomes faster.
*Wind and What It Does* (1963) is an **11-minute color educational film** produced by **Encyclopedia Britannica Educational Corporation (EBEC)**. Using a **scientific discovery approach**, the film ...
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How wind forms and moves
A simple explanation of how differences in air pressure and temperature cause air to move, creating the wind we experience every day.
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