What does independent and dependent variable?

The independent variable is the variable you change or manipulate in an experiment. The dependent variable is the variable that produces the outcome of the independent variable, the dependent variable is the variable you record in an experiment.

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.