* Organization: Living things are made up of cells, which are organized into tissues, organs, and organ systems. Rocks do not have this cellular structure.
* Metabolism: Living things carry out chemical reactions to obtain energy and maintain their bodies. Rocks do not have metabolic processes.
* Growth: Living things increase in size and complexity over time. Rocks do not grow in this way.
* Reproduction: Living things produce offspring. Rocks cannot reproduce.
* Response to stimuli: Living things react to changes in their environment. Rocks do not exhibit responses to stimuli.
* Adaptation: Living things evolve over generations to better suit their environment. Rocks do not evolve.
In essence, rocks are simply collections of minerals that have been cemented together over time. They lack the internal organization, processes, and characteristics that define life.