* For living organisms: The smallest unit of life is a cell. Cells are the basic building blocks of all living things.
* For nonliving things: There isn't really a smallest unit in the same way as living things. Nonliving things are made up of atoms and molecules, but they don't have the same organization or characteristics of life.
Think of it this way:
* A cell is like a tiny house: It has all the essential parts (organelles) needed to function and survive.
* Atoms and molecules are like the bricks and mortar: They make up everything, but they don't have the same complex abilities as a living cell.
Let me know if you'd like to explore either cells or atoms and molecules in more detail!
