Bess filled a syringe with water and left it by the sink in the sunshine. Ten minutes later she saw a puddle of water under the syring tip so she thought it was broken, but it wasnt.

What do you think caused the little puddle of water to appear under the syringe tip?

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See my later response above to a duplicate post.

The little puddle of water that appeared under the syringe tip was most likely caused by condensation. When Bess filled the syringe with water and left it by the sink in the sunshine, the warmer temperature caused the air around the syringe to heat up. As warm air can hold more moisture than cold air, the water inside the syringe evaporated, turning into water vapor.

When the water vapor came into contact with the cooler surface of the syringe tip, it started to cool down and condense back into a liquid. This condensation then dripped down and formed the puddle of water under the syringe tip. It is important to note that although Bess initially thought the syringe was broken, the presence of the puddle indicates that the syringe was still functioning properly, and the water loss was due to condensation rather than a leak or breakage.