describe upper mantle and lower mantle
Answers
Answer: The upper mantle begins just beneath the crust and ends at the lower mantle. The thickness of the upper mantle is between 200 and 250 miles. The entire mantle is about 1800 miles thick, which means the lower mantle makes up the bulk of this part of the Earth. The temperature of the mantle near the crust ranges from 900 to 1600 degrees Fahrenheit. It gets hotter at greater depths.
The outer layer of the earth, where we reside, is called the crust. Below the crust is the upper mantle, with the upper-most portion referred to as the asthenosphere. The upper mantle is liquid rock, and very hot. The upper mantle actually moves large areas of crust, called tectonic plates, very slowly. When tectonic plates move, they can form volcanoes, mountains, or earthquakes. The lower mantle is the lower liquid portion of the mantle ranging from 400 miles below the surface to about 1,800 miles below the surface.
Answer:
Explanation:
The upper mantle begins just beneath the crust and ends at the lower mantle. The lower mantle makes up the bulk of this part of the Earth. The temperature of the mantle near the crust ranges from 800 to 2200 degree Celsius. Upper mantle is made up of molten ultra-basic rocks whereas the lower mantle is made up of solid ultra-basic rocks.