the total quantity of dissolved salts in water
salinity
a compound made of hydrogen and oxygen
water
small organisms that drift through bodies of water; include animals, plants, and bacteria
plankton
water that is not fresh; water that has things dissolved in it that make it taste salty
salt water
having to do with the ocean
marine
a coastal body of water where fresh water from a river mixes with salt water from the ocean
estuary
the force per unit area exerted on an object
pressure
a large body of salt water that covers most of Earth
ocean
an object's mass divided by its volume; a measure of how many particles are packed together into a certain amount of space
density
large-scale movement of water within the oceans in a certain direction
ocean current
a depression in the ocean floor that ranges from a few feet to several miles in depth
ocean basin
a substance in which all of the parts are the same throughout
homogeneous