Which process releases the energy that eventually produces lightning in a thunderstorm? Water droplets freeze.
Water condenses to form clouds.
Moisture enters the upper atmosphere.
Air pressure decreases, causing rapid air movement. (sub science)

Agroup of engineering students from purdue university reported that its licking machine, modeled after a human tongue, took an average of 364 licks to get to the center of a tootsie pop. twenty of the group's volunteers assumed the licking challenge-unassisted by machinery-and averaged 252 licks each to the center.

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