BIO152H5 Lecture Notes - Lecture 2: Raft Spider, Evaporative Cooler, Surface Tension
Document Summary
Biology lecture #2: life on earth behind in water and evolved for 3 billion years, all life remains tied to water, water is important in chemical reactions, 70-95% water, water"s behaviour depends on its structure. Surface tension: a measure of how dif cult it is to the break the surface of water: speci c raft spider is allowing to walk on water because they do not break the hydrogen bonds. Evaporative cooling the bubbles that has the highest heat then the bonds are broken and become in a gaseous state. H-bonds have to be broken liquid water turns into vapor. Solid ice is less dense than water that"s why ice oats. It supports life because it does not sink and does not melt and animals use it as a platform for hunting and cray sh survive under ice all winter long. Large molecules: such as carbohydrates, proteins, lipids and nuclei acids. Carbohydrates functions (go back to grade 12 notes)
