Which of the variables affects the mass of the rock (samples)?
OR
which of the variables causes the breakdown of the rocks (samples)?
        
                    
             
        
        
        
Answer:
Primary producers use energy from the sun to produce 
Explanation:
 Primary producers use energy from the sun to produce their own food in the form of glucose, and then primary producers are eaten by primary consumers who are in turn eaten by secondary consumers, and so on, so that energy flows from one trophic level, or level of the food chain, to the next.
 
        
                    
             
        
        
        
Eukariotic cells have nuclei, while prokaryotic cells do not.
        
             
        
        
        
Answer:
A ball falling down from the grip of someone's hand
Explanation:
 
        
                    
             
        
        
        
Answer:
Biomes are determined by climate zones.
Explanation:
Because the makeup of a biome is dependent on its climate, biomes are often regarded as a synonymous with climate zones.