[Leeuwenhoek = Lay-von-hook]
[Schleiden = Shh-lie-den]
[Schwann = Shh-wan]
Example:
If you give the plant 20mL of water each week then it will grow the tallest.
Example of a Law: What goes up must come down.
Example of a Theory: Gravity is the result of the curvature of spacetime caused by mass and energy.