Learning basic geoscience in secondary schools can be challenging due to the large spatial and temporal scales of natural objects and phenomena, which limit opportunities for observation and experimentation. Experiments and observations on basic geoscientific topics were planned and carried out for schools. Specifically, students observe igneous rocks, discover their characteristics, and infer the Earth’s activities. Through these learning activities, learners can acquire the qualities and abilities necessary for scientific inquiries. This paper presents the learning and assessment plans implemented in this study and reports the results.