The document outlines the levels of organization of living things from smallest to largest: 1) Atoms are the smallest part of matter and are non-living. 2) Molecules like water and salts are made of bonded atoms and are also non-living. 3) Macromolecules like proteins and nucleic acids form larger non-living structures. 4) Organelles are structures within cells like mitochondria. 5) Cells are the basic units of structure and function and are living. 6) Tissues are groups of cells that perform similar functions. 7) Organs are made of tissues that work together to perform specific functions. 8) Organ systems are groups of organs that coordinate related functions like the circulatory or