Answer:
During ice ages, the most characteristic change to the planet has been the formation and spread large ice sheets and glaciers across much the Northern Hemisphere.
 
        
             
        
        
        
Ar I did this I think i got it right on edunuty
        
             
        
        
        
The two main types of bonds formed between atoms are ionic bonds and covalent bonds. An ionic bond is formed when one atom accepts or donates one or more of its valence electrons to another atom. A covalent bond is formed when atoms share valence electrons.
 
        
             
        
        
        
Answer:
Six electrons.
Explanation:
A carbon atom has six protons, so it must have six electrons.
 
        
             
        
        
        
They fuse helium into carbon. Hope it helped