Metamorphism is the addition of heat and/or pressure to existing rocks, which causes them to change physically and/or chemically so that they become a new rock. Metamorphic rocks may change so much that they may not resemble the original rock.
 
        
             
        
        
        
90.00 - 0.026 = 89.974.
Hope this helps.
        
             
        
        
        
Answer: thermosphere is the layer of the earth's atmosphere directly above the mesosphere and directly below the exosphere while mesosphere is layer of the earth's atmosphere that is directly above the stratosphere and directly below the thermosphere.