Which best describes the plate tectonic theory? A) The Earth is a big puzzle
B) Broken plates of the Earth float on the liquid mantle

Identify the structures ! 20 points

Which to produce involved from a symbiotic relationship of organisms which resulted in eukaryotic organisms contain chloroplast

On a spring day, a middle-latitude city (about 40? north latitude) has a surface (sea-level) temperature of 10 ? c. if vertical soundings reveal a nearly constant environmental lapse rate of 6.5 ? c per kilometer and a temperature at the tropopause of –55 ? c, what is the height of the tropopause?