Need to demonstrate buoyancy to your class? Rise to the occasion with a video from Veritasium! The narrator demonstrates how a golf ball behaves in dish detergent and saltwater, then adds the detergent to the saltwater for a surprising ending.

Concepts

buoyancy, density, saltwater, detergents, sinking and floating, making observations, making predictions, buoyant force

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Additional Tags

science

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Instructional Ideas

• Have the class divide into groups based on what they think will happen when someone adds detergent to saltwater, then develop an explanation for their answers together
• Use the link provided to show pupils the outcome of the demonstration

Classroom Considerations

• Make sure learners understand density and buoyant force before watching the video

• This video is hosted on YouTube

Pros

• The resource zooms in to give a better view of the phenomenon in the cylinder
• Viewers can make their predictions before following a link to an explanation of what is happening

Cons

• None

Common Core

SL.9-10.2