Hello how may I help you? What is the volume of the earth? I'm sorry. I don't have that information. Okay, what is the mass of the earth? I'm sorry. I can't help with that either. What is the circumfrance of the earth? You've me stumped. What is the diameter of the earth? If I knew the answer to this question, I would have been able to calculate the answer to the previous question. What is the volume of mars. Mars is even more of mystery than the earth.