Answer Choices
explain that the current created by a bird differs from that of an airplane.
stress the amount of control exerted by birds flying in a V formation.
indicate that wind movement is continuously changing.
emphasize that the flapping of a bird’s wings is powerful.
Explanation for Question 23 From the Reading Section on the Official Sat Practice Test 7
Question 23 asks the author includes the quotation air gets pretty unpredictable behind a 2 flapping wing in line 17 through 18 to do what? 3 So let's look at the sentence that they're referencing. 4 And then we can also look at some of the information around it to 5 determine the best answer for this question. 6 So we can read like a sentence before and a sentence after. 7 Um, so starting in line 13, it says models that treated flapping birds, 8 like fixed-wing airplanes estimate that they save energy by drafting off each other. 9 But currents created by airplanes are far more stable than the oscillating Eddie's coming 10 off of. A bird air gets pretty unpredictable behind the flapping wing, 11 says James Underwood, a locomotor biomechanics at the Royal veterinary college at the 12 university of London and Hatfield where the research took place. 13 So you can see here that this quote is being used in 14 a comparison or to like confirm or validate a comparison between 15 planes and birds. 16 So really we just want to look for an answer that appropriately captures that 17 comparison. So if we look at answer choice, 18 a, it says to explain that the current created by a bird differs from 19 that of an airplane. So this one does talk about that comparison here. 20 And it does talk about like the content of that comparison correctly, 21 right? They're talking about the air produced behind the plane versus the air produced 22 behind a bird. 23 And you can see here that occurrent c...