Your models showed the role of the movement of earths mantle in the movement of earths plates use the drop-down menus to describe your model represented this idea

List four observations that indicate that a chemical reaction may be taking place

The big bang nucleosynthesis theory states that elements were produced in the first few minutes of the big bang while elements have their origins in the interiors of stars, forming much later in the history of the universe.

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