The below is about the energy exchanges in earth systems.                                                                                                          
<u>Explanation</u>:
- Energy exchanges in earth systems are of many types.  The earth systems are atmosphere, geosphere, stratosphere, hydrosphere, and biosphere. All these earth systems exchange energy with each other.
- The earth gains energy reflected from the sky. It converts that energy back to space. That energy is equally given to all the planets in the sky.
- Each planet will absorb that energy and radiate heat. This heat is absorbed by all the places on the earth. So this is the energy exchange in the earth systems.                                                                                
 
        
                    
             
        
        
        
Galactic is referring to the galaxy and cosmos! :)
        
             
        
        
        
Answer:
SiO2(s) + 3C(s)  ------> SiC(s) + 2CO(g)
Explanation:
 The formula for silicon oxide is SiO2 and carbon is C. silicon carbide is SiC
 and carbon monoxide is CO.
An arrow is always used to separate the reactants (left) and products (right).
A balanced equation must contain equal number of atoms in each side of the equation. 
For example in the equation above, there are 1 atom of silicon appears on each side; 2 atoms of oxygen and three atoms of carbon.
 
        
             
        
        
        
Answer:
Cada uno de esos orbitals sons los differentes grupos en la tabla periodica.
Explanation: