Final answer:
The independent variable for physical and chemical changes can vary depending on the specific experiment or situation. However, in general, temperature is often considered an independent variable for both physical and chemical changes.
Step-by-step explanation:
The independent variable for physical and chemical changes can vary depending on the specific experiment or situation. However, in general, temperature is often considered an independent variable for both physical and chemical changes.
In physical changes, such as ice melting, temperature is the independent variable because changing the temperature can cause the physical state of the substance to change.
In chemical changes, such as the explosion of a firecracker, temperature can also be an independent variable. Changing the temperature can affect the rate at which the chemical reaction occurs and the products that are formed.