Sciencespeaking topic
The natural direction of heat is always from hot to cold. A refrigerator reverses this, but in return it heats the outside; the total disorder always increases. Can we only build local order by breaking order somewhere else?
— entropy / heat flow
practice with this topic
Set the timer (5-30 min), take 20 seconds of prep if you like, start talking. Jot your thoughts onto the sticky-note board.
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