Astronomy Homework 1 PDF

Preview

Summary

This is the first homework completely done....

Description

Homework 1: Trends and Correlation 1. My scatter chart → a. The trend is falling because it starts in the upper left corner and descends to the bottom right. b. No, they are not in a straight line. They are scattered at the top but slowly descend into more of a straighter line. c. It is easy to determine which planet is which because we are seeing how far away they are from the sun. Therefore, we know that mercury is the closest to the sun, and Pluto is the farthest from the sun. It also tells us the mean temperature of each planet, and the colder the planet is, the farther from the sun it is, and vice versa. d. Yes, it is easy to identify outliers on this scatter plot because there are two planets that are either very close or very far away from the sun; therefore making them on exact opposites of the graph, and away from the other plots. 2. My scatter plot → a. Falling trend, due to the slight fall in the dots from left to right. b. The plots appear to be in a straighter line on the logarithmic plot. c. It is easier to identify which planet is which on the logarithmic chart because the plots are more spread out, and are shown more specifically how far away from the sun they are. Therefore, we can easily tell that mercury is the closest to the sun, and then it goes Venus, even though they look almost the same distance from the sun on the linear chart.

d. It is easier to identify outliers on the linear graph because all the plots are closer together with Venus as the obvious outlier as the hottest planet, where as the logarithmic graph, the plots are already very spread apart. e. Three advantages to using the logarithmic chart instead of the linear chart are: it is easier to determine which planet is which, you can clearly see where the plots are supposed to be on the graph, and being able to clearly determine if the chart has a rising trend or falling trend or no trend at all. f. The trend is falling because the planets that are closest to the sun are also the hottest, due to the heat that the sun gives off. Therefore, the planets that are not as close to the sun, are not as hot. This creates a downward slope because we start with the hottest planet that is simultaneously closest to the sun, and then the distance because longer while the temperature goes down. g. The outlier is Venus. Venus is the outlier because of what the planet is made up of. Venus’s atmosphere has a thicker layer, which traps heat on the planet, therefore heating up the planet significantly more than any other planet even though it is the second planet from the sun. This is why it is so high up on the graph, even though Mercury (the closest planet to the sun) is significantly lower on the chart....