1. In the space below, draw the movement of a sand particle by saltation.

  

2. Draw a sand dune in the space below. Show the direction the wind blows, and cross-beds.
    
    
    
    
    
    
    
    
    
3. If the wind is not blowing, could sand dunes form? Explain your answer.
    
    
    
4. Can sand dunes form on the Moon? Explain your answer.