What is meant by effect of current electricity?

What body of water is the second cataract of the nile river submerged under

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."

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