ESS205H1 Lecture 4: Lecture 4
Document Summary
The atmosphere acts like a buffer (protects earth from incoming solar radiation ) Longer wavelength have high energy and vice versa. Gamma rays are absorbed in the upper part of atmosphere. In poles, pressure is lower and air always moves from high pressure to low pressure. Thus, air moves to the lower pressure area. Like an open system but in a state of equilibrium. The atmospheric and hydrospheric conditions and blah blah make it the only habitable place for us humans. Rock record got destroyed because of plate tectonics. Structure of core: inner core (solid), outer core (molten) Temperature is very high in i(cid:374)(cid:374)e(cid:396) (cid:272)o(cid:396)e (cid:271)ut it"s still solid (cid:271)e(cid:272)ause of high p(cid:396)essu(cid:396)e. Iron ad stuff started sinking to the centre of the earth. Oldest continental crust is 4 billion years old. There was no oxygen in the atmosphere discuss changes in the atmosphere. Need to know when which organisms came around at what time.
