* Hypertonic: "Hyper" means "above" or "more than." A hypertonic solution has a higher concentration of solutes (like salt) compared to another solution, like the inside of a cell.

* Isotonic: "Iso" means "equal." An isotonic solution has the same concentration of solutes as another solution.

* Hypotonic: "Hypo" means "below" or "less than." A hypotonic solution has a lower concentration of solutes compared to another solution.

Think of it this way: Imagine you have three glasses of water:

* Hypertonic: Lots of salt dissolved in the water.

* Isotonic: Just the right amount of salt for the water.

* Hypotonic: Very little salt dissolved in the water.

The hypertonic glass would have the most salt.