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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 |