Science 8Messana

Hydrology Unit

Basics you need to know…Water is essential for__________________________= all water environments on

Earth (________+ water _______ ground+ water ______ ground + water in________________)

Polar Covalent Molecule – __________________________

Basics you need to know…Water is the______________________

It dissolves ___________from rocks and soils

It dissolves ________ in the atmosphereMakes nutrients and

gases_____________________________________

Forces of AttractionCohesion =

attraction of_________________water molecules sticking

to__________________Adhesion =

attraction of molecules of_________________________

water molecules sticking to __________________________________

Phenomena caused by ForcesSurface Tension = force on the ____or

____________of water, holding it in a tight____________________Caused by ______________, water

molecules want to cling to each other

Phenomena caused by ForcesCapillary Action = water moving _______

against the force of _________ in a _________ passageway, along the surface of a ______ substanceCaused by_____________, water

molecules clinging to ____________________(EX: side of a pipette, graduated cylinder, plant roots/stem, etc.)

DensityD = mass / volumeDensity of water = ________ g/cubic cm (~1)

Materials LESS DENSE than water will _________ in water

Materials MORE DENSE than waterwill _______ in water

Substances will layer as follows:_____________

______________

Buoyancy

_________________that works against gravity to____________________

Less dense materials _______ in more dense materials because of buoyancy

The ______ DENSE the liquid, the __________ an object will float in it

The ______DENSE the liquid, the _________ an object will float in it

Dissolving Solute in WaterDissolving a substance in water will

_________ the density of the water___________ in the______________

Objects will be ______buoyant in salt water than fresh water

___________!!

Specific HeatAmount of __________needed to raise

________of a substance by_______________Water has a ___________specific heat =

heats up and cools down__________Water is resistant to abrupt changes in

temperatureThis trait protects aquatic organisms from

temperature__________________