Chlorophyll is a pigment found in the thylakoid membranes of the chloroplasts in the leaves. This is why plants are green. The simple answer is that plants are green because they have green chloroplasts.
 
        
             
        
        
        
Answer:
Aluminum
Explanation:
The density of Aluminum is 2.7 g/cm3 
We know the volume and mass of the unknown metal, as density is mass/volume:  81g/30cm3 = 2.7 g/cm3 which is the density of Aluminum :)
 
        
                    
             
        
        
        
Answer:
Sorry kid my middle school day re long gone but ummm... don't do drugs
:)
Explanation:
 
        
                    
             
        
        
        
The answer to this question would be frequency.
The pitch of a sound makes is directly related to the frequency of the vibration. For every octave, the number of frequency will be increased 2 times. The frequency is influenced by various things. Changing the length of the instrument is the easiest method to change the frequency.
        
             
        
        
        
Answer:
False
Explanation:
If it is a T or F questions then yes it is false.