Explanation for Question 25 From the Reading Section on the 2017 May Sat
Question 25 says which choice provides the best evidence for the answer to the 2 previous question. How do we determine in the previous video that 3 the correct answer to question 24 is a, 4 that based on the passage, the question how similar to earth is that planet 5 and its ratio of rocks. A gas is a question that astronomers are unable 6 to answer unless they know a particular exoplanets mass. 7 So we can look at the lines of evidence given to us as answer 8 choices in question 25 and see which one best supports this idea. 9 So we're looking for elements of the exoplanets mass, 10 and we're also looking for a discussion of like rock and gas or composition. 11 So we'll start with answer choice a lines five through nine. 12 They say the results announced at a meeting of the American astronomical society. 13 Also show the power of an up-and-coming method of calculating the masses of alien 14 worlds from the way they eclipse their stars. 15 So you do have that element there of mass, 16 right? But we don't have any discussion of rock gas or like the composition 17 of these planets, the exoplanets specifically. 18 So a would be incorrect if we look at B, 19 it says to know whether it's Rocky gaseous or some mixture of the two. 20 So there's our reference to rock and gas. 21 Astronomers also need to know its mass also have the reference to mass. 22 And it's very explicitly saying that like, Hey, 23 this is something that the masses needed for. 24 So that pretty much goes along wi...