Official April 13th 2013 ACT Science Section Thread

<p>I put stream A for the question asking what stream would be less likely to freeze under the given circumstances. The introductory paragraph indicated that stream A was in constant movement while stream B was stationary.</p>

<p>B is less likely to freeze.</p>

<p>Stream A was in constant motion, but the graph shows that Stream A at the bottom decreased faster. in temperature.</p>

<p>@SgtGutter Yes, but the question was asking which one would decrease in temperature slower at the top; A decreased slower at the top than did B.</p>

<p>Also put stream B</p>

<p>I believe the question explicitly stated that one stream was moving faster than the other (if memory serves me right, it was stream A). Which ever stream was moving faster was the correct answer. The parameters of the question were not necessarily equal to the parameters of the passage, therefore, the question’s parameters take hold for that particular question.</p>

<p>wait, can anyone explain to me why the temperature would increase (the insulator question)</p>

<p>The container is set in a freezer, and at 2 hours it was 14 degrees. But with an insulated lid, it’d take longer to freeze the fluid within the container; therefore, it’d have to be warmer than 14 degrees but less than 16 (i think it was 16) because that was the initial temperature.</p>

<p>Could anyone tell me all 7 passages? I can’t think and I’m trying to get an idea of my score on the science section (I know of at least 3 I’ve gotten wrong…maybe it’s two, but definitely more than one), so i feel like remembering the passages would help me get a better idea (I need a 34 on Science for a 36 composite). </p>

<p>I have: stars passage about distance between them and etc., fluids in the refrigerated container passage, arguing scientists passage about KMT, rats/cola/women/bone density passage, ion experiment passage…so i’m forgetting two passages. What were they?</p>

<p>What was the answer to the one with comparing intake of women vs rats. It had to do with bone density. Women took in more cola, but what was the answer?</p>

<p>If you’re talking about the question I think you are, I’m pretty sure i got C (or H), which was like “rats have smaller bones and have less bone density”</p>

<p>Good, that’s what I put. 36 still stands! This is awesome! I have never achieved this high in science.</p>

<p>One of the passages you’re missing is the snow crab/fish</p>

<p>was one of the answers to a question at the end of a passage -14 degrees Celsius??? I think u had to find it in the passage explicitly.</p>

<p>The question stated A was moving. B was still.</p>

<p>It asks which stream freezes slower.</p>

<p>If you look at the graph, the graph of the still stream dropped temperature less. Therefore, the stream still freezes slower.</p>

<p>what did you guys get for the last question about the coco-cola passage where it said that the objects studied got different solid food and asked which study would support this? Did you get both of them because for study A it said “the food-and-drink questionnaire” so i thought that meant the women got coca-cola and the food was implied</p>

<p>@sgtgutter</p>

<p>I believe you are mistaken. The graph of the circulating water dropped in temperature slower than the still water. Scientific logic would also dictate in this sense: The faster the water is moving, the more hydrogen bonds are being broken and formed, which impedes the phase change from liquid to solid, leading to a longer phase change time. You can check your local stream or river in the winter and notice that it is not frozen.</p>

<p>@sweetiixangel</p>

<p>The answer was the women. They were not monitored for food intake. The rats were given a specific and same diet throughout the experiment.</p>

<p>@alexmass</p>

<p>Yes, if the water/ice temperature was in equilibrium with the freezer temperature, it would be -14 degrees.</p>

<p>Sent from my HTC Glacier using CC</p>

<p>The experiment showed the still water dropping slower. The graphs showed that.</p>

<p>But the still water hit 0 degrees initially first at the top of the water.</p>