2. Equal distribution of molecules (equilibrium)
concentration gradient

3. gradient -
measurement of how much something changes as you move from one region to another

4. concentration gradient - measurement of how the concentration of something changes from one place to another.
High Concentration
Low Concentration
In which direction will the molecules move without energy being applied to them?
diffusion

5. Net movement (high to low concentration)
High Concentration
Net movement (high to low concentration)
Some movement in the opposite direction (random motion of molecules)
Low Concentration

12. Hypertonic solution

13. Hypotonic solution