Flu-like Illness. One of the earliest HIV symptoms in men is a severe 'flu-like' illness, known as the 'seroconversion illness.'. Seroconversion is the point in time where a person's blood is converted from being HIV negative to HIV positive, by the production of antibodies.
Erosion causes the surface of mountains to be younger than the rocks that form the mountains themselves. Glacial processes produce characteristic landforms, such as pyramidal peaks, knife-edge arÃªtes, and bowl-shaped cirques that can contain lakes.
Explain how studying mountain ranges can help scientists learn more about plate tectonics and continental drift. Because plate tectonics are what a mountain is caused by. Continental drift would tell you how it moved. Continents also cause mountain ranges to form. Describe how volcanoes form at subduction zones. Because two plates collide and one goes under and then they push upwared to make a volcano.