For our project we made a white board video. We drew everything on our cycle and then labeled them. It starts our with the air evaporating from the ocean when it mixes with the gasses from the volcano it is sulfur dioxide. As it transfers through the air it turns into the sulfur trioxide then sulfuric acid. As it goes into the cloud it turns into fog precipitation. It rains down and it makes plants grow. The animals eat the plants and then their decaying matter goes into the earth.  In the ground it turns into hydrogen sulfide. Then the cycle starts over.