If the tectonic plates had higher rates of movement than what they currently do, then the surface of Earth would have been much different. The first noticeable difference would have that the average elevation would be higher than it is now. The reason for that will be that the erosion rates will remain as they are, while the orogenic processes will speed up, so there will be much faster formation of hills and mountains.
The climate would vary much faster on global level, as faster movement of the continents will contribute to fast changes in the ocean currents, and the global wind patterns, all that can have been impact on the relief.
Another thing would be the merging and breaking up of the continental masses, so a formation of a super-continent will occur, and with it lot of new land forms around the areas that are boundaries of the plates, but also that super-continent will break up quicker, so new continental masses will form quickly as well.
With the directions of movement of the tectonic plates as they are, if the rates of movement speed up, Australia will very soon merge with the southern islands of Southeast Asia, Africa (Nubian plate), North America, and Eurasia will merge, while the Somali plate of Africa will move into the Indian Ocean and close it up. South America will isolate itself from North America and move deeper into what is now the Pacific, while Antarctica will move gradually toward the Equator, all of which will make the world look much different, and with constant rise of new land forms and changes of the surface of out planet.
Answer:
Option (C)
Explanation:
CO₂ is one of the main green house gases on earth. A small increase in its concentration can lead to significant changes on earth. When the incoming solar radiations are incident on the earth's surface, some of the energy is absorbed by the atmosphere and the earth's surface. And some of the energy from the land surface after absorption is released into the atmosphere in the form of infrared radiations. The escaping of these radiations from earth is directly dependent on the concentration of CO₂. An increase in the amount of CO₂ will not allow these IR radiations to be removed, and this will result in the global rising of the temperature, leading to catastrophic changes.
Thus, the correct answer is option (C).
Answer:
c. Chemical weathering
Explanation:
One of the famous landmarks in New York City is "The Statue of Liberty." It was built in<em> 1886</em> as a gift to the Americans from France.
The statue is covered with<em> copper sheets</em>, thus, it used to have a brown color. However, over time, the color turned into greenish-blue. This is because<u> the copper sheets underwent chemical weathering</u>. Such process occurred as a result of the reaction of copper with Oxygen in the air and with water. It produced<em> "copper carbonate,"</em> which is<em> greenish-blue</em> in color. Such color was noticeable in<em> </em>1900<em>, </em>but it covered the entire statue in <em>1906.</em>
Answer:
A cannot be accurately measured
Answer: None, it would be 24 hours of darkness
Explanation:
This is because December 21st marks the astronomical start of winter for the northern hemisphere with the winter solstice. During this season the days are shorter than the nights, and as we get closer to the North Pole, we will have up to 24 hours of darkness.
That is why on December 21st, the sun is not visible for 24 hours and the next days (the closer it is to the north pole) it will stay that way. Therefore, the inhabitants of this area will have longer periods of darkness.
