Density 

Density describes how compact or concentrated something is. 

I have two boxes, one big one small but they both weigh the same 

The water at the ocean surface is moved primarily by winds that blow in certain patterns because of the Earth's spin and the Coriolis Effect.

 Horizontal Movement 

The water at the ocean surface is moved primarily by winds that blow in certain patterns because of the Earth's spin and the Coriolis Effect.

 Horizontal Movement 

Coriolis Effect

An effect whereby a mass moving in a rotating system experiences a force.

Rightward in the northern hemisphere and leaftward in the southern hemisphere 

Deep ocean currents are driven by density and temperature gradients.

Conveyor belt 

the cycle of processes by which water circulates between the earth's oceans, atmosphere, and land, involving precipitation

Evaporation and condensation 

1. water held underground in the soil or in pores and crevices in rock.

   
   

   Comes from rain or melting snow 

water that collects on the surface of the ground.

rivers, lakes, streams

a shaft sunk into the ground to obtain water, oil, or gas.

long-term water-level declines caused by sustained groundwater pumping. 

Many areas of the United States are experiencing groundwater depletion.

the movement of saline water into freshwater aquifers, which can lead to contamination of drinking water sources and other consequences.

mostly happens in coastal aquifers 

a barrier constructed to hold back water and raise its level, the resulting reservoir being used in the generation of electricity or as a water supply.

Beavers 

the process of removing dams from river systems.