CHM299Y5 Lecture : lastminuteplanetearthnotes.docx
Document Summary
Hydrogen atoms form as well as heliums. Atoms collected into nebulae which then collapsed into dense balls which made stars. Dusty gassy and icy rings began to clump together due to gravity formed planetesimals, then collisions kept adding cuz the planetesials acted like a vaccum, eventually called a protoplanet. Huge asteroid collided casusing shit to break off and become the moon. Heat frm collisions and radioactive elements caused differentiation causing the iron to sink to bottom of earth. denser shit sinks. Earth is round cause gravity changed its shape. this is cuz as earth was getting bigger its interior becomes warm and protrusions are pulled inward making a sphere cuz mass evenly distributed. Atmosphere develops frm volcanic gases. wen earth became cool moisture condenses and rains to make oceans. The wilson cycle describes ocean basins, and the stages that they go through from creation to elimination. There are six seperate stages of the wilson cycle:
