2.)Which action forms a different chemical substance? A. crushing a rock
B. burning a piece of wood
C. mixing salt and pepper
D. melting an ice cube

Write a paragraph that provides examples of each stage of volcanic activity, a description of the volcano, and facts about each stage.

Which of these expressions are correct variations of the combined gas law? p1v1t2 = p2v2t1 both

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.