In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.

[Q]: Question: Reid analyzes particle speed. The heaviest particle he sees likely diffuses _____ than the lightest particle. 
 Answer: slower
[A]: The mass of the particles: lighter particles will diffuse faster, because on average they move faster.


[Q]: Question: If Mona is creating a reaction using solid reactants and she decreases the surface area of those reactants, what happens to the reaction rate? 
 Answer: decreases
[A]: Therefore, increasing the surface area of solid reactants increases the reaction rate.


[Q]: Question: More particles are deposited when a river's speed 
 Answer: decreases
[A]:
The size of the eroded particles depends on the velocity of the water. Eventually, the water deposits the materials. As water slows, larger particles are deposited. As the water slows even more, smaller particles are deposited.