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Since this one has more marbles for each box part (4) than the first one (3), we can say that the second one is DENSER. Salinity adds to mass (no. of marbles) but not to the volume (size of box). Thus, the more salinity, the denser. Temperature may also affect water density. When the temperature is high, molecules in water disperse and move around more rapidy than they usually do in order to spread the heat energy.
ocean surface temperatures are part of the forcing for the atmosphere, changes in high-latitude salinity distribution can be involved in climate change. In addition to its effect on seawater density, salinity is useful in itself as a tracer of ocean circulation and mixing. Salinity is established in the oceanâs surface layer by local processes, and therefore salinity variations within the ocean depend on the surface origin of a parcel of water. Mix-ing between waters of different salinities occurs within the ocean, and so the original salinity changes gradually. How-