Final answer:
The independent variable is the amount of imitation bat wing used in each batch. The dependent variable is the color of the potion. The constants in the experiment are the cauldrons and fire source. The constants in the experiment are the type of cauldrons used and the fire source, as she is using the same ones for each batch.
Step-by-step explanation:
The independent variable in this experiment is the amount of imitation bat wing used in each batch of Polyjuice Potion. Hermione is testing different amounts to see which one will turn the potion green. The dependent variable is the color of the potion. Hermione expects that when the correct amount of imitation bat wing is added, the potion will turn green. The constants in the experiment are the type of cauldrons used and the fire source, as she is using the same ones for each batch.
independent variable is the amount of imitation bat wing used in each batch. The dependent variable is the color of the potion. The constants in the experiment are the cauldrons and fire source. The constants in the experiment are the type of cauldrons used and the fire source, as she is using the same ones for each batch.