AGRON 160- Midterm Exam Guide - Comprehensive Notes for the exam ( 46 pages long!)
13 Oct 2017
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Document Summary
Net positive and negative charges on each side of the molecule give water the following properties: cohesion- opposite charges attrach each other, adhesion- water attracts and bonds well with other substances (minerals, chemicals) Concentration of dissolved solids, liquids, and gases, susoended solids, pathogens and heat in a given quantity of water. High temps reduce amount of dissolved oxygen that water can hold. Impacted by: shading, time of year, flow in and out of water body, industrial releases: dissolved oxygen (do) O2 becomes dissolved in water because of difference in concentrations in atmosphere (21%) versus water (1%) Amount is function of temperature, salinity, atmospheric pressure, and oxygen demand from aquatic life: ph: unite of measure that describes the degree of acidity or alkalinity of a solution, turbidity. Suspended matter (silt, salt, plankton) in water reduces transmission of light. Toxic chemicals, metals, and water borne diseases can attach to suspended particles. Increase cost and difficulty of treating drinking water.
