How is it possible to san diego california denver and colorado have the same average daily temperature of 72 degrees

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

The creation of the trans-siberian railway allowed people to travel across russia. how could this railway impact russian culture?

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."