BIOL 1201 Lecture : Biology 1201 Lecture 2
Document Summary
The four emergent properties of water that are important for life are: cohesion, moderation of temperature, expansion upon freezing, and solvent properties. More heat is required to raise the temperature of water. Surfactant-treated water droplets will form a thin film instead of beading on a waxed surface. Surfactant-treated water will form smaller droplets when dripping from a sink. Predict how life on earth would be different if water were less polar. Sweating would be a less effective means of keep cool. In a lake, mineral nutrients accumulate at the bottom while dissolved oxygen is greater near the surface. These nutrients can be mixed during water turnover that occurs with annual temperature changes. The density of water is greatest at 4degrees c. (when ice starts to melt, it falls down into the water and makes it more dense. This stirs up the water and starts a current. )
