EARTHSC 2WW3 Midterm: Water Midterm Review.docx
23 Feb 2015
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Document Summary
Understand the physical and chemical properties of water (e. g. sublimation, surface tension) What is water: strong covalent bonds between hydrogen and oxygen (which is why water does not disappear easily) but weak. Hydrogen bonds between water molecule to allow movement. Water properties: cohesion - allows water to reform with other water molecules. Adhesion - provides ability to break down substances. Tension - allows small insects to walk" on water. Sublimation- changes state from solid to vapour without becoming a liquid. Thermal: expansion (4 c, freezing (0 ), density (1kg/l), , specific heat (4200 joules = 1 increase of 1 kg of water) o o. Know the basic distribution of freshwater resources (largest and smallest) Also water is used for drinking: world 97% saltwater, and 3% freshwater. Largest freshwater distribution glaciers and permanent snow (68%) groundwater (29%) ground ice and permafrost (0. 85%) other (1%)
