click below
click below
Normal Size Small Size show me how
sciencep2
earth science
Question | Answer |
---|---|
what are currents | cohesive streams of sea water |
what are currents caused by | wind,gravity, and density |
what two currents are there | deep circulation and surface circulation |
how many gyre are there | there are five |
what are gyre made | by currents |
when does the surface current end | The surface current consists of the first 1,300 feet of water. |
when does the deep currents start | 1,300 feet of water |
why is the deep current different than the surface current | it has more salt content |
whats the surface zone | area of shallow water that receives the greatest amount of sunlight |
whats the surface zone | area of shallow water that receives the greatest amount of sunlight |
whats the middle zone | lies bettwen the surface zone and the deep zone |
whats the deep zone | dosent receive sunlight |
whats salinity | a measure of the mass of dissolved solids in a mass of water |
diffrance bettwen seawater and brackish water | brackish water is from the river that enters the sea seawater is from the sea |
minerals from the seafloor | manganese nodules gold zinc |
energy resources from the seafloor | oil,natural gas,methane hydrates |
whats in a water molecule | 1oxygen-negative 2hydro-posotive |
whats adhesion | the attraction among molecules that are alike |
whats cohesion | the attraction among molecules that are not alike |
what happen when the surface water of a pond cools to 0 degrees | becomes less dense |
is it true that the the density of ice is lower than the density of the same volume of liquid water | true |
is it true that the density of freshwater is lowest at 4 degrees | no-greatest |
is it ture that the particles of liquid water are closer together than the particles of the same volume of frozen water | no-further apart |
one way in which water is a unique compound | ice flouts in water |