Understanding Physical Science

Mini-Quiz: How Objects Float in Fluids

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Take this Mini-Quiz to check your understanding of the lesson material.

QUIZ

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Since carbon dioxide is more dense than air, what happens to a CO2 balloon?
It floats upwardGood try, but not right. Select another answer. It falls to the groundThat is correct. You understand about floating in fluids. It explodesSorry, not correct. Try another button.
If a material had a density of 0.8 gm/cm3, what percentage would be above the waterline?
20%Correct. You sure are smart. 80%Oops! Wrong answer. Re-read the question and try again. 100%Sorry, not correct. Try another button.
Since lead is more dense than steel, could a lead boat float in water?
No, only steel boats will floatGood try, but not right. Select another answer. Lead dissolves in water, so you could never find outOops! Wrong answer. Re-read the question and try again. Yes, provided it is hollow and has a lower density than waterThat is correct. You understand about floating in fluids.

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Resources and references

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Buoyancy – HyperPhysics

Matter Resources

Physics Resources

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Self-check your understanding

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