Chemistry Unit 1A ReviewChemistry Unit 1A Review

Sources and Uses of WaterSources and Uses of Water

Cleaning WaterCleaning Water FiltersFilters

– remove solid remove solid materialsmaterials

CharcoalCharcoal– removes odorremoves odor

DistillationDistillation– removes removes

salts/ions/charged salts/ions/charged particlesparticles

Tyndall EffectTyndall Effect Positive = see the light = particles in Positive = see the light = particles in

the path of the lightthe path of the light Negative = don’t see the light = no Negative = don’t see the light = no

particles presentparticles present

Conductivity TestConductivity Test Positive = conducts electricity =light bulb Positive = conducts electricity =light bulb

will lights up = charged particles/ions/salts will lights up = charged particles/ions/salts are presentare present

•Negative = light bulb doesn’t light up = no charged particles/ions/salts

Hydrologic CycleHydrologic Cycle Groundwater = storage = aquiferGroundwater = storage = aquifer Percolation pond = replenishes Percolation pond = replenishes

groundwatergroundwater

Evaporation

Gas state

Condensation

Liquid state

Water SourcesWater Sources San JoseSan Jose

– ground water (.62%)ground water (.62%) OtherOther

– Glaciers - 2.11%Glaciers - 2.11%– Lakes - .009%Lakes - .009%– Atomosphere - .001%Atomosphere - .001%– Rivers - 0.0001%Rivers - 0.0001%

Water UseWater Use Main uses of waterMain uses of water

– irrigation (in the west)irrigation (in the west)– heating/cooling (all others)heating/cooling (all others)

Personal UsePersonal Use•watering (1130 L/hour) ***•washing (180-680L/time)•showers/toilets (19L/min or flush) ****•drinking, cooking (varies)•about 300 L per day per person

Direct vs Indirect Uses of Direct vs Indirect Uses of WaterWater

Direct = used “last”Direct = used “last”– boiled egg = water boiled inboiled egg = water boiled in– soup = water in soupsoup = water in soup

Indirect = used before, not Indirect = used before, not always by personalways by person– boiled egg = water for chicken, boiled egg = water for chicken,

grain, truck, cartongrain, truck, carton– soup = water for can, chicken, soup = water for can, chicken,

grain, processing, labelgrain, processing, label