Answer  the Air Pollution From a Power Plant photograph. Tell students that pollutants emitted into the atmosphere do not stay in the atmosphere or even directly above the polluting source forever. They move throughout the atmosphere and are moved and removed by natural processes.
Explanation:
 
        
             
        
        
        
Answer:
The correct answer is B, 60%
Explanation:
Humus, which ranges in color from brown to black, consists of about 60 percent carbon, 6 percent nitrogen, and smaller amounts of phosphorus and sulfur
 
        
             
        
        
        
Prey Definition:
 Any animal that is killed and eaten by another animal.
 
        
             
        
        
        
They could improve the experiment that they made by adding another variable such as: watering the plants with fresh water. This way they could have a better comparison how plants grow based on the type of water they are exposed with.