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Knowledge and Skills Statement

Matter and energy. The student knows that matter is made of atoms, can be classified according to its properties, and can undergo changes.
Glossary terms and definitions are consistent across kindergarten through high school in the TEKS Guide. The definitions are intended to give educators a common understanding of the terms regardless of what grade level they teach. Glossary definitions are not intended for use with students.

the smallest particle of matter that has distinct physical and chemical properties; consists of a nucleus which contains protons and neutrons and an electron cloud which contains electrons

substance that occupies space, has mass, and is composed of microscopic particles

characteristic of matter that can be used to identify particular materials