What is primarily made up of igneous rocks

Which of teh following would explain the importance of the trans-siberian railroad to russia's economy? (schoology test)

What are three similarities between medc countries and ledc countries?

All of the following are reasons why deserts extremely susceptible to wind erosion except a. they lack major root systems b. they contain thin, dry soil c. they have very few plants and trees d. they are extremely hot and lack water