The preview is a still photo of the Halona Blowhole located on the island of Oahu, a few miles east of Honolulu. You are getting a 20 second videoclip of the blowhole in action.
You’ll need to have Qucktime video player loaded on your computer. Quicktime can be downloaded free from Apple Quicktime (www.apple.com/quicktime/download/ ).

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I have been teaching 8th grade Science for the past 32 years.