Diet vs Regular Soda Float Test
One may float while the other sinks.
Teaching & key ideas
What you do: Place both cans in water.
What students see: One may float while the other sinks.
Why it works: Dissolved sugar adds mass; similar volume gives different average density.
Question to ask: What is different inside two cans that look the same?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: What is different inside two cans that look the same?