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Maximizing Cube Surface Area: A Science Teacher's Guide

Explore the concept of surface area to volume ratio with cubes, understand why bacteria don't have lungs, and learn about advantages and disadvantages of different ratios. Discover how to choose the best ice cube for cooling drinks efficiently.

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Maximizing Cube Surface Area: A Science Teacher's Guide

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  1. www.thescienceteacher.co.uk| resources for science teachers who like to think

  2. How could you increase the surface area of this cube?

  3. We could cut it in half.

  4. 1cm Describe how surface area to volume ratio changes as cubes increase in size? Use information in this table to explain why bacteria don’t have lungs. Give one disadvantage to a cell of having a large surface area to volume ratio?

  5. 1cm Describe how surface area to volume ratio changes as cubes increase in size? As the size of the cube increases the surface area to volume ratio decreases. Use information in this table to explain why bacteria don’t have lungs. Bacteria are very small, and so have a large surface area to volume ratio. This allows nutrients and gases to exchange rapidly into the cell and therefore they don’t require lungs. Give one disadvantage to a cell of having a large surface area to volume ratio? Rapid water loss.

  6. Going deeper Use your knowledge of surface area to volume ratio to suggest which ice cube is better. Consider both the cooling effect and drink dilution.

  7. Going deeper The Sumpri ice cube is best because it has a smaller surface area to volume ratio. The volume of the ice provides the cooling effect but the surface area controls how fast the ice melts – the lower the surface area to volume ratio the longer the ice will take to melt for the same cooling effect. Essentially, a lower surface area to volume ratio keeps your drink cold, but stops it from becoming too diluted. (source)

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