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.
Wooden shakes and shingles also have many nooks and crannies that attract insects, thereby enticing woodpeckers. Insects will follow cracks between adjacent shakes upward underneath the overlapping upper shake in order to lay eggs, hide, pupate, and overwinter. Woodpeckers in search of these insects will drill straight lines of vertical holes, anywhere from three to six holes in a line depending on the size of the shake, directly up the middle of one of the overlapping shakes.