CPCS 181 – INTRODUCTION TO ASTRONOMY QUESTIONS WITH VERIFIED ANSWERS | COMPLETE SET

lOMoAR cPSD|26712239 lOMoAR cPSD|26712239 CPCS 181 – INTRODUCTION TO ASTRONOMY QUESTIONS WITH VERIFIED ANSWERS | COMPLETE SET Quiz 1 Question 1 1 point A light-year is ⬜ an interval of time □ a measure of length ⬜ an indication of speed Question 2 1 point This telescope image was taken of the Andromeda Galaxy, which is located about 2.5 million ly away from us. This image shows how the Andromeda Galaxy ⬜ looks right now □ looked in the past ⬜ will look in the future Question 3 1 point Which of the following statements does NOT use the term “light -year” in an appropriate way? ⬜ It's about 4 light -years from here to Proxima Centauri. ⬜ The Milky Way Galaxy is about 100,000 light - years in diameter. ⬜ It will take the Voyager spacecraft about 20,000 years to travel just 1 light -year. □ It will take me light-years to complete this homework assignment. ⬜ A light -year is about 10 trillion kilometers. Question 4 1 point Your satellite orbits close to the Sun and detects a solar flare erupting at 10:00 PM, as lOMoAR cPSD|26712239 measured by the satellite’s clock. Your clock is exactly synchronized with the satellite clock. The Sun is located 8 light minutes away from Earth. If you wish to observe this flare from your backyard, you need to look at: ⬜ 9:52 PM ⬜ 10:00 PM □ 10:08 PM ⬜ 10:52 PM ⬜ None of the above are correct, since this flare has already occurred. Part 2 - Case Study Imagine that you have received six pictures of six different children who live near six of the closest stars to the Su n. Each picture shows a child on his or her 12th birthday. The pictures were each broadcast directly to you (using a satellite) on the day of the child’s birthday. Note the abbreviation “ly” is used below to represent a light-year. Eugene lives on a planet orbiting Ross 154, which is 9.5 ly from the Sun. Max lives on a planet orbiting Barnard’s Star, which is 6.0 ly from the Sun. Crystal lives on a planet orbiting Sirius, which is 8.6 ly from the Sun. Sydney lives on a planet orbiting Alpha Centauri, which is 4.3 ly from the Sun. Kelly lives on a planet orbiting Epsilon Eridani, which is 10.8 ly from the Sun. Mitch lives on a planet orbiting Procyon, which is 11.4 ly from the Sun. Question 5 1 point Which child lives closest to our Sun? ⬜ Eugene ⬜ Max ⬜ Crystal □ Sydney ⬜ Kelly ⬜ Mitch Question 6 1 point What was the greatest amount of time that it took for any one of the pictures to travel from the child to you? " 11.4 years " Question 7 1 point Imagine that the six pictures all arrived to you at exactly the same time. For this to be true, which child had to send their picture first? ⬜ Eugene ⬜ Max ⬜ Crystal ⬜ Sydney ⬜ Kelly □ Mitch Question 8 1 point Imagine that the six pictures all arrived to you at exactly the same time. For this to be true, which child had to send their picture last? ⬜ Eugene ⬜ Max ⬜ Crystal □ Sydney lOMoAR cPSD|26712239 ⬜ Kelly ⬜ Mitch lOMoAR cPSD|26712239 Question 9 6 points If each child was 12 years old when he or she sent his or her picture to you, how old was each of the children when you received their picture? Write the current age of each child in the corresponding blanks and DO NOT ROUND YOUR ANSWERS - KEEP ANY DECIMAL PLACES. Answer this way (without the quotes) " years old" Eugene: 21.5 years old Max: 18 years old Crystal: 20.6 years old Sydney: 16.3 years old Kelly: 22.8 years old Mitch: 23.4 years old Question 10 1 point What is the relationship between the actual age of each child when you received the message and his or her distance away from Earth? Answer by filling in the blank to complete the sentence: "The farther away the child is, the older the child" Question 11 1 point Imagine that you simultaneously receive the satellite transmission of two pictures of two people that live on planets orbiting two different stars. Each image shows the people at their 21st birthday parties. Consider the following possible interpretations that could be made from your observations. Which do you think is the most plausible interpretation? ⬜ The person that is closer to you is actually the older of the two people. □ The person that is farther from you is actually the older of the two people. ⬜ The people are actually different ages but at the same distance from you. ⬜ Both people are the same age but at different distances from you. Part 3 - Application Question 12 3 points Imagine that you are observing the light from a distant star that was located in a galaxy 100 million ly away from you. By analysis of the starlight received, you are able to tell that the image we see is of a 10 million year old star. You are also able to predict that the star will have a total lifetime of 50 million years, at which point it will end in a catastrophic explosive death called a Supernova. Answer the following questions in the blanks provided. a) How old does the star appear to us here on Earth? Write your answer this way (without the quotes):