These may all be classified as

Which type of landforms forms at the plate boundary as a result of divergent stress

Which diagram best represents the chromosomes that would be found in a two new skin cells produced as a result of this process?

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?