it hydrostatic im not sure
Earth's crust are pushing against each other miles below the Earth's surface, causing earthquakes, volcanoes and the movement of the continents. Approximately 30 plates are mapped out throughout the world. The plates consist of the Earth's crust and of the mantle, which is a thick layer of hot rock. Below that lies a sea of magma.
Hope this helps
Answer:
Scientist count the world humans population with an organization called The United Nations Population Division (UNPD),
Explanation:
Which keeps track of the world population, projects that the world's human population will hit 7 billion on Halloween Day 2011. Admittedly, that is just an estimate: There's no way to know exactly how many people are alive at any given moment, and the true date that humanity's ranks will surpass 7 billion could come in the weeks or months before or after Oct. 31. Nonetheless, the UN's guess is the best there is.
