Basically the study of rocks
Water sources in the Middle East are limited and very polluted. These people do not have clean water, and the water they can get, they are very thankful for, although it is full of bacteria and mud.
Your answer is: B) limited.
Have an amazing day!
That depends on how close you are to the equator, in coulombia the temperature barely changes wile in south Canada it changes every season
By observing how seismic waves are absorbed and refracted, scientist have been able to work out where the properties of the earth change dramatically. our understanding of the internal structures of the earth and the size of its core is based on these observations.
basically:
size of core
structure of the earth I.e. the layers of the earth
and I think the last one is how the internal structure is changing? not sure on the last one but its still a solid guess.
