THERMOCLINEDEMONSTRATION
PartI–InternalWave
FigureA.Modelbeforethepartitionwasremoved.
HotWater(red)Temperature:__________°C/__________°F
ColdWater(blue)Temperature:__________°C/__________°F
PartII–Thermocline
FigureB.Modelafterthepartitionwasremovedandinternalwavehassettled.
____________________Layer(____________________)Temperature:__________°C/__________°F
____________________Layer(____________________)Temperature:__________°C/__________°F
____________________Layer(____________________)Temperature:__________°C/__________°F
____________________Layer(____________________)Temperature:__________°C/__________°F
____________________Layer(____________________)Temperature:__________°C/__________°F
Explainwhythefluidschangedposition.
Post-DemoQuestions
1. Discusswaysinwhichdensitycurrentsbegin.
2. ExplainhowconvectionisabletomoveheatthroughouttheEarth’ssurfacewaters.
3. Definedensityandexplainhowdifferencesintemperatureaffectthedensityofwater.
4. Identifythethreetemperaturezonesfoundinlargebodiesofwater.
HALOCLINEANDWATERMASSDEMONSTRATION
PartI–HaloclineandDeterminingSalinity
FigureC.Modelbeforethepartitionwasremoved.
Freshwater(clear)
SalineWater(blue)Salinity:__________o/oo
𝑠𝑎𝑙𝑖𝑛𝑖𝑡𝑦 =
(𝑚𝑎𝑠𝑠 𝑜𝑓 𝑠𝑎𝑙𝑡)×1000
( 𝑚𝑎𝑠𝑠 𝑜𝑓 𝑠𝑎𝑙𝑡 + 𝑚𝑎𝑠𝑠 𝑜𝑓 𝑤𝑎𝑡𝑒𝑟 )
tankholds5Lwater
40gofsaltwasaddedtoonesideofapartitionedtank
FigureD.Modelafterthepartitionwasremovedandinternalwavehassettled.
Freshwater(clear)
SalineWater(blue)
Explainwhythefluidschangedposition.
PartII–WaterMassesandDeterminingSalinity
FigureE.Modelafterthepartitionwasaddedand
onesideoftankwasmixedwithredandbluecoloring.
StratifiedSide,Freshwater(clear)andSalineWater(blue)
MixedSide(purple)
FigureF.Modelafterthepartitionwasremovedandinternalwavehassettled.
Freshwater(clear)
ModeratelySalineWater(purple)
MostSalineWater(blue)
Explainwhythefluidschangedposition.
Determinethesalinityofthemoderatelysalinewater.
Howmanytotalgramsofsaltwouldneedtobeaddedto5,000mLoffreshwaterinthetanktoequal
theaveragesalinityoftheoceans?
Post-DemoQuestions
1. Definesalinityanddescribesomeconditionsthatcauseittovary.
2. Explainhowdifferencesinsalinityaffectthedensityofwater.
3. Definewatermassesanddiscusswaysinwhichdensitycurrentsbegin.
4. Calculatesalinityofsalinesolutionsinpartsperthousand(o/oo).