The different shapes of the moon you see from Earth are called?

What are four key elements of the study of economics?

The earths core is made up mainly of what 2 substances? 2. like an egg, earth has a core, a layer surrounding the core, and a thin, hard outer layer. which layers of the earth match the layers of an egg?

Which areas of earth receive the most precipitation on average? a. tropics b. temperate zones c. regions near 30? n and s latitudes d. polar zones 1