Small insects can walk across the surface of calm water.
Their feet push the surface of the water down slightly,
somewhat like a person walking across a trampoline, but
they do not break the surface. What is the best
explanation for why this happens?

A. The insects are light enough so that they do not break the hydrogen bonds holding the water molecules

B. The insects actually use their wings to hover slightly above the waters surface and they only skim it with their feet

C. The insects feet are non- polar so they are repelled by the polar water molecules and are pushed away from the waters surface

D. The insects are small enough to see the individual water molecules so they are able to step carefully from one molecule to the next

The insects are light enough so that they do not break the hydrogen bonds holding the water molecules when they walk across the surface of calm water their feet push the surface of the water down slightly and it is due to surface tension.Thus, option A is correct.

What is surface tension?

Surface tension is the tendency of liquid surfaces at rest to shrink into the minimum surface area possible.

Surface tension is responsible for the shape of liquid droplets and the surface tension of water is about 72 mN/m at room temperature.

Water has a tremendous amount of surface tension due to which small mass distributed effectively on its surface.

Surface tension is represented by the symbol T.

Therefore,the insects are light enough so that they do not break the hydrogen bonds holding the water molecules when they walk across the surface of calm water their feet push the surface of the water down slightly and it is due to surface tension.Thus, option A is correct.

Learn more about surface tension here:

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