Sciencespeaking topic
An object you throw into space never truly stops; it keeps going until it hits something. The natural state is not stillness but motion. Why does 'stopping' feel natural to us and 'moving' feel like something that takes effort?
— inertia / Newton's first law
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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