This book provides an engaging and easily understandable introduction to chemistry. Starting from natural phenomena and experiments, learners embark on a journey of research and discovery. Since the course incorporates current findings from educational sciences, it is well-suited as a foundation for modern chemistry teaching. The journey into the realm of chemistry begins with the question "What is fire?" and fascinating experiments related to it, culminating in Dalton's atomic model. This chemical theory allows us to answer the question of how new substances can be formed. Important milestones along the way include chemical elements, states of matter, the concept of the smallest particles, the particle model, as well as pure substances and mixtures.