Small voltages and circuits
Choose low-voltage aids for use with an adult. These resources do not cover measurements or experiments on mains wiring.
Parents’ guide ↗Does 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.
Original explanations based on the cited sources.
Electric current is a directed flow of electric charge. Electrons carry it in metal wires, while ions can carry it in solutions.
Sources
An electrochemical cell turns energy from chemical reactions into electrical energy. A battery can contain one or more cells and power a closed circuit.
Sources
Text from the recording’s subtitles.
After the film, explain what happened in your own words. Draw an example and choose a question to explore together.
Choose low-voltage aids for use with an adult. These resources do not cover measurements or experiments on mains wiring.
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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.
2:15This upbeat children’s song uses a toy cart to show how force and mass affect acceleration. Kids discover why a stronger net force changes motion faster at the same mass, while added mass produces less acceleration under the same force. It also introduces the simple relationship F = ma.
3:12Can invisible air help hold up water? This upbeat science song shows how the atmosphere surrounds Earth and how atmospheric pressure acts from every direction. Children discover how pressure differences and gravity affect a card-covered cup. Try the demonstration only with an adult, over a bowl, using an unbreakable cup when possible.
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