All you need is a matchbox, a small candle, a light plastic cup, and thread to create this incredible physics demonstration! 🔥
​This setup shows how heat transfer by convection works: the candle flame heats the air inside the cup, making it less dense than the surrounding cooler air. This difference in density creates buoyancy, causing the cup to rise and float.
​Science doesn't have to be complicated! Always ensure a responsible adult is present when working with fire.
​Setup: The cup is lightly suspended over the flame by threads attached to the candle/matchbox base.

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Can you charge a modern smartphone wirelessly using only a stack of standard batteries? 🔋 We put this viral science "hack" to the test!
​While this setup looks like a demonstration of electromagnetic induction (the principle behind wireless charging), the voltage and current output from these few AA/AAA batteries are far too low to power the phone's charging coil and internal circuitry.
​The charging animation you see is often a visual trick or an edited effect, as this configuration is highly unlikely to provide a genuine charge to a modern smartphone! Science fact check complete!