Explore the fundamentals of climate change in this comprehensive lecture from the Mathematical Modeling of Climate, Ocean, and Atmosphere Processes pedagogical program. Delve into the intricacies of the climate system, energy balance, and climate models as presented by Angshuman Modak from the International Centre for Theoretical Sciences. Gain insights into the complex dynamics of Earth's climate, understanding how energy flows through the system and how scientists use models to predict future changes. Suitable for Masters students, final year undergraduates, and anyone interested in climate science, this lecture requires no prior background in climate-atmosphere-ocean dynamics. Part of a broader program covering fluid dynamics, monsoon dynamics, and machine learning applications in atmospheric and oceanic processes, this talk contributes to building an inclusive environment for diverse individuals in the field of climate science.