<span>Tectonic Plates can't carry both ocean floor and continents on the same plate.</span>
        
                    
             
        
        
        
There are 50 states of the US
        
                    
             
        
        
        
Answer:
a. the mekong river is the longest
 
        
                    
             
        
        
        
Answer:
The Solar System is the gravitationally bound system of the Sun and the objects that orbit it, either directly or indirectly. Of the objects that orbit the Sun directly, the largest are the eight planets, with the remainder being smaller objects, the dwarf planets and small Solar System bodies.
Explanation:
 
        
                    
             
        
        
        
The fact that volcanic rock has often been found early in the rock record but less frequently in later rock layers suggest to scientists the following conclusion  about early earth: <span>volcanic activity was more common in the past than it is today.
</span>Besides volcanic activity in general, also huge volcanic eruptions<span> were much </span>more common than today<span>.</span>