Which Liquids Conduct?
Some complete circuit much better than others.
Teaching & key ideas
What you do: Test liquids with same electrodes.
What students see: Some complete circuit much better than others.
Why it works: Mobile ions carry electric current through solutions.
Question to ask: Why does dissolved salt conduct but sugar may not?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: Why does dissolved salt conduct but sugar may not?