Answer:
Explanation:  
Once the sun's energy reaches earth, it is intercepted first by the atmosphere. A small part of the sun's energy is directly absorbed, particularly by certain gases such as ozone and water vapor. Some of the sun's energy is reflected back to space by clouds and the earth's surface.
 
        
             
        
        
        
Answer:
Group	17  Melting point	113.7°C, 236.7°F, 386.9 K  
Period	5  Boiling point	184.4°C, 363.9°F, 457.6 K  
Block	p  Density (g cm−3)	4.933  
Atomic number	53  Relative atomic mass	126.904  
State at 20°C	Solid  Key isotopes	127I  
Electron configuration	[Kr] 4d105s25p5  CAS number	7553-56-2 
Explanation:
 
        
             
        
        
        
the gastrovascular system is also known as the coelenteron, and is commonly known as a "blind gut" or "blind sac", since food enters and waste exits through the same orifice.
so True
 
        
                    
             
        
        
        
Layer 8 is older than layer 1
        
                    
             
        
        
        
Polysaccharides are more difficult to digest then monosaccharides because they are much larger molecules.