To understand the changes of substances contained in such a kind of substance and
substance characteristics then need a deep study of the concept. In this concept is expected to
understand the changes of objects such as substance type and substance characteristics. Types
of substances and characteristics of substances through physical changes and chemical changes
and means of separation consisting of two or more substances. The principle of separation of
the mixture is based on differences in physical properties of its constituents, such as
substances, particle size, melting point, boiling point, magnetic properties, solubility, and so
forth. This study aims to produce a web-based module of changes in objects that are valid,
practical, and have effectiveness of student learning outcomes and activities on natural science
learning. The experiment was conducted on 30 children in South Sumatera. The case of the
development of the learning module of change of the object is influenced by the child's
understanding of the concept. Expected to be adapted by world teachers
