The Andes Mountain range is one of the most contrasting features on the earth's surface. It is formed due to the sharing of the convergent plate boundary between the Nazca plate (oceanic) and the South American (continental) plate.
The Nazca plate is getting subducted continuously beneath the South American plate, as a result of which a subduction zone is formed and also the rocks at the edge of the South American plate are crushed and folded significantly. As the plate melts at greater depth, the rocks melt and mixes up with the melt and rise upward, resulting in the formation of the San Andes mountains.
Considering that the South American plate is stationary, the Nazca plate is moving towards the east direction at a rate of 3 inches per year.
What is it? Greenhouse effect It is a natural phenomenon that occurs on planet Earth. The process is similar to that in a greenhouse used for plant cultivation, but at the planetary level.
How does it work? The atmosphere captures some of the sun's rays that reach the earth's crust, keeping them inside to maintain an approximate temperature of 15 ° C. If the atmosphere does not catch any of these rays that bounce off the surface, the Earth's average temperature would be several degrees below zero. One part of the solar energy is absorbed by the atmosphere, another part is reflected by the clouds, and another part reaches the planet as the visible light that warms us. Once solar radiation has warmed the earth's surface, the earth returns energy, reflecting it and sending it back to the atmosphere.
What are greenhouse gases and how do they relate to the greenhouse effect? The atmosphere is composed of various natural gases. Mostly nitrogen, oxygen and argon. Other gases such as water vapor, carbon dioxide, methane, nitrogen oxide and ozone are those that have a greater impact on the greenhouse effect. Greenhouse gases retain some of this solar energy inside the planet, and do not let it go into outer space. It is this radiation, which cannot escape the planet, that causes the surface temperature to rise.
Why is the greenhouse effect important to life on Earth? It is a very important process thanks to which the temperature of the planet is regulated to make life possible, allowing to maintain an adequate and pleasant temperature for living beings, retaining part of the sun's energy and releasing another part towards space.
The Polaris or the pole star is located at the height of about the 30° above the northern hemisphere and is found when we reach a point that is at the 90 degrees of the latitudes and thus it appears to be directly overhead and
The City of the Miami s located in the unites states and is the southern state of the North America and has an elevation of bout 6 feet that are about 2 meters form the mean sea level. With the lowest elevation of 0 meters and the highest elevation of about the 42 meters. The city covers about 56 square miles of area.
<u>For a traveler to find out the position on the earth he needs to move in the direction of the north star and firm the respective compass will guide him in the navigation on the map. As the rising altitude and distance from the mean sea level will also help in the identification of his position.</u>