What is the best description of weathering

A. building up earths surface through depositing

C. when rock layers from horizontally

D. breakdown of rock through mechanical or cemical processes

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

  the mississippians were considered to be  horticulturalists, which means they were

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.