This paper addresses the subject of the semiosis process in the transactions between teachers and students about the knowledge at stake in science education. We present a conceptualisation of these transactions as a joint action between students and teachers. This conceptualisation enables us to understand the semiosis process as it unfolds during…

Oceans play an important role in weather and climate through transfers of heat and moisture to the atmosphere, and by moving heat and climate-relevant molecules like carbon dioxide around the globe. Energy also transfers from the atmosphere to the surface of the ocean, traveling down through the water column creating ocean currents that transport…