University of Phoenix Material
Earth’s Dynamic Ocean and Atmosphere I Worksheet
From Visualizing Earth Science, by Merali, Z., and Skinner, B. J, 2009, Hoboken, NJ: Wiley. Copyright 2009 by Wiley. Adapted with permission.
Sections 12.1 and 12.2 of the text discuss the origin and composition of the world ocean’s seawater.
What is the current theory on the evolution of the world ocean?
Discuss the origin of the salinity of seawater and how the ocean maintains salinity.
A: The current theory on the evolution of the worlds ocean is that, it was possibly formed between four, and four and a half billion years ago. The oldest grain found was a grain called zircon. It was found in Australia. That element shows to have made contact…show more content… While tides are most commonly associated with oceans, gravity creates tides in the atmosphere and even the lithosphere. Gravity is one of the major forces responsible for creating tides. Another is inertia, which is the force that acts to counterbalance gravity. Together, gravity and inertia are responsible for the creation of two major tidal bulges on the earth. The gravitational effects of the moon and the sun affect the Earth’s tides on a monthly basis.
Oceanfront land is considered prime real estate. Private owners and government projects take a number of different steps to protect land and property. Discuss some of the techniques and structures used to prevent loss of property due to erosion. Are these methods successful?
A: Some methods to prevent soil erosion are, planting vegetation because it lessens the impact of rainfall to soil. Another method is to build retaining walls because The retaining wall will act as a shield for the soil and prevent soil erosion from occurring. Yet another method that I have seen used regularly is tarpping and sand bagging. This is where you take large plastic sheets, or tarps and lay them down on the area in which you wish to prevent erosion. Then the sand bags are placed along the edges to keep the tarp from blowing away. These methods do not completely stop erosion all together, but they do lessen the time it would originally take without any protection.