The determination of seawater density, and its variation, is therefore one of the most important tasks in oceanography. How do you think the density of sea water changes with water depth? The density of sea water depends on: temperature T, salinity S and ; pressure P, which increases with water depth. Oceanographers discuss the density of sea water somewhat differently than a chemist or physicist. The values of sea water density, labeled on the diagonal lines in the graph below, do not include the density of fresh water (1 gram per cubic centimeter g/cm 3) or the decimal places.
Woodpeckers eat nuts, berries, termites, grubs, and other bugs that live inside trees. It pecks through the wood of a tree to find the bugs living inside. That is why their beaks are so long... and strong! + 66 others found this useful.
Repellents. Many items can be safely attached to trees that scare off woodpeckers for a short while. These include pinwheels, strips of aluminum foil or brightly colored plastic with one end attached to the tree and the other loose to flap in the wind.Another option is to tie pie pans to affected trees.oodpeckers use their powerful beaks to drill holes in tree bark for food, as part of their courtship rituals and to make nests. By killing insects, woodpeckers help healthy trees.