66.0% barium and 34.0% chlorine

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

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange

How can carbon move from "land" to bodies of water? describe the way human impact has lead to increased levels of co2 in the atmosphere.