The nuclear reaction that occurs by combining two or more lighter atoms into a larger one is called what?
a. nuclear fusion
b. nuclear fission
c. beta emission
d. alpha emission

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.

level 4 to level 2 : ))