australia is in the continent of australia it is both a continent and a country note contrary to erroneous opinion it is not in the continent of either aus tralasia or oceania neither of these is a geographical continent but rather they are both political regionst is sometimes referred to as an island continent because it is one of only two continents in the world completely surrounded by water australia is part of the geographic region of oceania which by definition is not actually a continent
So, the colder the water, the more dense it is. Increasing salinity also increases the density of sea water. Less dense water floats on top of more dense water. Given two layers of water with the same salinity, the warmer water will float on top of the colder water.
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.