Organic molecules are compounds that contain carbon and hydrogen atoms, often in combination with other elements such as oxygen, nitrogen, sulfur, and phosphorus. Inorganic molecules, on the other hand, are typically simpler compounds that do not contain carbon-hydrogen bonds and are not derived from living organisms. Examples of inorganic molecules include water, carbon dioxide, and salts. Organic molecules are typically associated with living organisms and biological processes, while inorganic molecules are more commonly found in non-living matter and geological processes.