Igneous rocks are made mainly of compounds of:
carbon and hydrogen
silicon and oxygen
carbon and silicon
carbon and oxygen

The 5th term in a series of even number that begin 3x

What is the border between layers a through f and layer g called?

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