How many states are there now in what used to be called yugoslavia before 1991?

Which of the following is an example of an outdated theory based on the consensus of the scientific community ? a. big bangb. geocentric solar systemc. heliocentric theoryd. plate tectonics answer : geocentric solar system

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."

What processes does carbon cycle through the biosphere?