Answer:
Because humans couldn’t see outside of earth. Gailieo Galilei used his telescope to prove this was wrong ultimately. 
More:
it was debunked till the 16th century. Scientists observations and knowledge had advanced too far for the geocentric model to explain them.
I looked like the sun was moving from earth but it really earth thats moving around the sun. The parallax is effect helped explain this.
        
             
        
        
        
Used to define and identify geological times.<span />
        
                    
             
        
        
        
Explanation:
Organic polymers are macromolecules composed of many repeating monomer units. Both synthetic and natural polymers play a crucial role in everyday life. Polysaccharides, polypeptides, and polynucleotides are the main types of biopolymers in living cells.