Answer:
In this, the controlled variables are stirring and type of sugar. As more stirring might elevate the amount of sugar that dissolves, and different kind of sugars might dissolve in distinct concentrations. So, in order to make sure a fair test, there is a need to keep these variables similar for each cup of water.
Explanation:
 
        
             
        
        
        
Answer
Two structures located in the diencephalon are hypothalamus and epithalamus
Explanation
The diencephalon of the human brain has four main structures which are the hypothalamus, the thalamus, the epithalamus and the subthalamus. Thalamus structure is at the center of the brain which relays sensory impulses to the cerebral cortex. The hypothalamus regulates the temperature of the body while the epithalamus maintains the circadian rhythms.
 
        
             
        
        
        
The older the Earth's crust, the denser it is.
        
             
        
        
        
Osmosis! Osmosis is the process that water diffuses across the plasma membrane. 
        
                    
             
        
        
        
we need a graph to do this can u provide a picture?