instruction:
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.
question:
Question: Henry noticed that his piece of cake was lighter than his piece of butter. The cake was _____ dense. 
 Answer: less
answer:
A given volume of a denser substance is heavier than the same volume of a less dense substance.


question:
Question: Dean wants his solution to be as acidic as possible, so his concentration of hydrogen ions will be 
 Answer: higher
answer:
With a higher concentration of hydrogen ions, a solution is more acidic but has a lower pH.


question:
Question: James is a much bigger person than Sally. Which person has more gravity? 
 Answer: James
answer:

Gravity is a pull which all matter exerts on all other matter, the more mass, the stronger the pull.