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.

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

[EX Q]: Question: Mary and Clare go to the beach. Mary uses a sunscreen with SPF 45. Clare uses a sunscreen that has an SPF of 20. Who skin will be protected less? 
 Answer: Clare
[EX A]: A sunscreen with a higher SPF protects the skin longer.

[EX Q]: Question: If there are less crests coming through, there will be _____ wave frequency. 
 Answer: less
[EX A]:
Wave frequency can be measured by counting the number of crests or compressions that pass the point in 1 second or other time period. The higher the number is, the greater is the frequency of the wave.