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?
less useful isotope?

(Question)
Most nutrients are washed into ocean water from land. Therefore, water closer to shore tends to have more nutrients. Having read the above passage, choose the right answer to the following question (choices are more or fewer ): The closer that water gets to the shore the more or fewer nutrients there are?
(Answer)
more

Ques: The more current, the stronger the electromagnet. Having read the above passage, choose the right answer to the following question (choices are decrease it or increase it ): Dan was excited to try out an electromagnet and was happy when it was very effective. He knew however that if he changed the current he could make it weaker. How should he adjust the current decrease it or increase it?
Ans: decrease it

(Q).
Therefore, increasing the surface area of solid reactants increases the reaction rate. Having read the above passage, choose the right answer to the following question (choices are slower or faster ): If you break up something before putting it into water it will dissolve slower or faster?
(A).
faster

Ques:In erosion, the higher the elevation, the farther the stream is from where it will reach base level and the more cutting it has to do. Having read the above passage, choose the right answer to the following question (choices are low or high ): When water is eroding down a river it will do more cutting if it is low or high?

Ans:high

Ques: Bigger atoms have more electrons. Having read the above passage, choose the right answer to the following question (choices are more electrons or less electrons ): As atoms get larger they are able to attract more electrons or less electrons?
Ans:
more electrons