Follow a lemon-juice treasure map as its dried lines become almost invisible, then turn brown with careful warming. This catchy science song explains that the juice marks remain on the paper and change with heat. Only an adult handles the iron while the child watches from a safe distance.
Text from the recording’s subtitles.
2:34Follow a lemon-juice treasure map as its dried lines become almost invisible, then turn brown with careful warming. This catchy science song explains that the juice marks remain on the paper and change with heat. Only an adult handles the iron while the child watches from a safe distance.
2:08Does a lemon contain ready-made electricity? This upbeat song shows how lemon juice acts as an electrolyte while separate zinc and copper electrodes take part in a chemical reaction. Connect the leads and a multimeter reveals the small voltage as a number. Try it only with adult help.
3:17How does a waterfall begin, and why does its edge slowly move? This song shows gravity pulling river water over a rocky ledge, while the current carries sand and pebbles that wear away softer rock over a long time. It’s one common way waterfalls form.
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