Explain the importance of knowledge of scale and distance to a person​

Describe the four major spheres of the earth system; identify the parts of the earth they each represent. explain what is meant by the "earth system."

According to the population pyramid, in 2000 china had about 120 million people in which age-group?

Select the correct answer from each drop-down menu. this map shows how climate change might affect precipitation patterns in the great plains of the united states by the end of this century. brown shows a decrease in precipitation, and blue shows an increase. the maps differ based on the predicted levels of greenhouse gas emissions. the maps show that northern areas should get . southern areas will likely get . to use these maps to prepare for natural disasters in the great plains, scientists need to ask, ?