Which of these protects earth from harmful radiation when in the stratosphere but is a pollutant at lower altitudes? carbon oxygen ozone hydrogen

In 1915 the german geologist and meteorologist alfred wegener first proposed the theory of continental drift, which states that parts of the earth's crust slowly drift atop a liquid core. the fossil record supports and gives credibility to the theories of continental drift and plate tectonics.

Which domain endings indicate websites that are most likely to be reliable sources? check all that apply. sites ending in .net

How have ethnic groups shaped the population in central america and the caribbean? how has migration shaped the population in central america and the caribbean? how has small land areas shaped population in central america and the caribbean? how has a rapid population growth shaped the population in central america and the caribbean?