The autonomic nervous system (ANS) is the part of the nervous system which is involuntary. It is composed of neurons that is responsible for impulsing the central nervous system to muscles and glands. The hypothalamus is the most important part and main control center of ANS. It is responsible for many homeostatic processes inside our body. Both the autonomic function and the endocrine function is regulated by the hypothalamus.
Magnetism is a class of physical phenomena that are mediated by magnetic fields. Electric currents and the magnetic moments of elementary particles give rise to a magnetic field, which acts on other currents and magnetic moments.The Earth's magnetic field is somewhat caused by the composition of the earth's core which is rich in iron minerals. There is a solid inner core that is made of iron which makes up to 2/3 of the moon's size. The charged metal of the iron produces electric currents, consequently resulting to Earth's magnetic field.
Movements of tectonic plates create volcanoes along the plate boundaries, which erupt and form mountains. A volcanic arc system is a series of volcanoes that form near a subduction zone where the crust of a sinking oceanic plate melts.