Question: A thinner wire is more difficult for electrons to move through than a thicker wire. Having read the above passage, choose the right answer to the following question (choices are easier or harder ): If Jim is transmitting electricity through a wire and he increases the size of that wire, the electrons move through it easier or harder?
Answer: easier

Question: If salt is added to a volume of water, there are more molecules in the same volume, so the water is denser. Having read the above passage, choose the right answer to the following question (choices are more dense or less dense ): When water absorbs salt the water becomes more dense or less dense?
Answer: more dense

Question: Because these isotopes decay more slowly, they can be used to date much older specimens. Having read the above passage, choose the right answer to the following question (choices are less useful isotope? or more useful isotope ): For dating the age of a fossil, and compared to the isotope Carbon 14 with its 5730 year half-life, would Francium with a 22 minute half-life be a less useful isotope? or more useful isotope?
Answer:
less useful isotope?