Look at these three things: an ice cube, a square of chocolate and a small lump of butter. If gentle warmth reaches them, which do you think will change first, and will any change only a little?
Show of hands as we go: ice first… chocolate… butter… We will watch carefully and find out.
You have already met ice that turns to water on a warm day. Today we name what is happening.
Two words for today: melt means a solid softens and turns liquid when it is warmed. Cool means something loses heat and gets colder.
Which of our three materials do you think will melt first on gentle warmth? After we watch, we will add one more word for changes that can go back.
Our question today: What happens to ice, chocolate and butter when we warm them gently, and what happens when we cool them again?
On your Investigation Journal page, write or draw what you think will happen to each one when it is warmed, and whether you think any of them can go back when cooled. Say why in a short phrase.
Watch the tray at the front. Three foil dishes hold ice, chocolate and butter. Warm water sits under the tray. Keep your Investigation Journal open: check the prediction you already wrote, then jot or sketch as you watch (solid, soft edges, or puddle).
Look for soft edges, shiny pools and any dish that still holds its shape. We do not touch or taste anything on the tray.
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