Is Marble rock natural or man made?

What does negative attitude mean in communication? Where does the heat and energy come from a solid? What Collective bits of matter particles that have gravitated toward a centralized black hole are called .? What did Copernicous Do? Do isotopes lose electrons? Why do isotopes decay at an exponential rather than a linear rate? How are substances formed a compound? Is a street lamp a human feature? Why might a company be interested in producing amylase in a product? Ice floats on water because ice is less dence than water how is this helpful to fish that live in a lake? 12 south 77 west nearest city? What is stars generally made of? What is the difference between concentrated and super saturated solution? Does water must be heated in order to move from a gasesous to a liquid state? How does a cell use exocytosis to release the comtents of a vesicle outside the cell? Can you break your ankle by jumping off walls? What is the role of alpha particle in Rutherford experiment and why he had not taken proton instead of alpha particle? What is the U shaped bend of the renal tubicle? What is steeper than a mesa? How are grasslands being threatned?