Final answer:
Organic molecules contain carbon, while inorganic compounds do not. Organic compounds are larger and more complex than inorganic molecules, and they are found in living organisms. Inorganic compounds mainly consist of water and salts.
Step-by-step explanation:
Organic molecules contain carbon; inorganic compounds do not. The atoms of an organic molecule are typically organized around chains of carbon atoms. Organic compounds are generally larger and more complex than inorganic molecules, and they form the cells of living organisms. In contrast, inorganic compounds mainly consist of water and salts.