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User: Imani Blackman WARNING: You must not leave this exam form! If you try to click back into this exam again prior to submitting, your access to it will be denied! S1 Our Universe Module Exam Warning: There is a checkbox at the bottom of the exam form that you MUST check prior to submitting this exam. Failure to do so may cause your work to be lost. Top of Form THIS IS A TIMED EXAM! Click to see time remaining Question 1 (Multiple Choice Worth 2 points) [OU.03]A star is observed from two positions of Earth in its orbit, in summer and winter. Which of these is the best method to calculate the approximate distance of the star from Earth? measure the parallax and use it in calculations measure the red shift of emitted light and use it in calculations use doppler effect to calculate the shift in light traveling from star to Earth in winter use doppler effect to calculate the shift in light traveling from star to Earth in summer Question 2 (Multiple Choice Worth 2 points) [OU.04]The Big Bang Theory is accepted at present as the best explanation of the development of the universe over time. Which of these statements is correct about this theory? It will remain unchanged in the future. It may change due to new scientific evidences. It will be proved invalid by scientific investigation. It may have been tested by only one group of scientists. Question 3 (Multiple Choice Worth 2 points) [OU.04]Two groups of scientists got different results while studying about the expansion of the universe. What do the two results most likely indicate? the ideas of both groups of scientists are invalid all scientists do not have access to equally accurate data there are several testable ideas to describe the origin of the universe it is impossible to have a single acceptable theory about the universe Question 4 (Multiple Choice Worth 2 points) [OU.01]The picture below shows the position of Earth and two stars. Star 2 is 52 light years from Earth and 18 light years from Star 1. If Star 1 explodes as a supernova, in how many years would the explosion be seen from Earth? 18 34 52 70 Question 5 (Multiple Choice Worth 2 points) [OU.03]Which of these is the best method to estimate the speed at which a star is moving away from Earth? measure the star’s red shift measure the star’s blue shift calculate the parallax due to changes in Earth’s position calculate the pitch due to changes in frequency of light Question 6 (Multiple Choice Worth 2 points) [OU.03]Which of these properties of a star best determines its life cycle? brightness mass density temperature Question 7 (Multiple Choice Worth 2 points) [OU.01]Infrared radiations are produced when a changing electric field creates a longitudinal wave parallel to it longitudinal wave perpendicular to it changing magnetic field parallel to it changing magnetic field perpendicular to it Question 8 (Multiple Choice Worth 2 points) [OU.01]Which of these statements is correct for light waves? It does not travel through water. It does not travel through vacuum. It travels fastest through vacuum. It travels fastest through water. Question 9 (Multiple Choice Worth 2 points) [OU.04]The COBE mission and WMAP mission provide evidence to support the Hubble’s Law Big Bang Theory Steady State Theory Doppler Effect Question 10 (Multiple Choice Worth 2 points) [OU.02]X-rays cannot pass through Earth’s atmosphere. Which of these is the best location to place a telescope used to observe x-rays from stars? high-flying aircraft top of building mountain space Question 11 (Multiple Choice Worth 2 points) [OU.04]Based on an experiment, a cosmologist has proposed a new theory to explain the origin of the universe. The theory will be accepted when its results match with the Big Bang Theory the experiment gives different data every time it is repeated its results are repeated and verified by scientists worldwide the experiment rejects all old theories on the origin of the universe Question 12 (Multiple Choice Worth 2 points) [OU.04]Two stars, Star 1 and Star 2, are at almost equal distances from Earth. The table below shows the masses of the two stars. Name of Star Mass of Star (in million solar masses) Star 1 3.61 Star 2 3.59 Which of these statements is most likely correct about the stars? Earth exerts almost equal gravitation force on both the stars. Earth exerts greater gravitation force on Star 2 than on Star 1. Star 1 attracts Star 2 with a greater gravitational force than Star 2 attracts Star 1. Star 2 attracts Star 1 with a greater gravitational force than Star 1 attracts Star 2. Question 13 (Multiple Choice Worth 2 points) [OU.03]The pictures below show the wavelengths and intensities of electromagnetic radiations emitted by three stars, Star 1, Star 2, and Star 3. Which of these is most likely to happen if Star 2 becomes cooler? its peak will rise higher than Star 1 its peak will rise higher than Star 3 it will look more like Star 3 it will look more like Star 1 Question 14 (Multiple Choice Worth 2 points) [OU.02] NASA’s space shuttle program in Florida will end in 2011. Which of these would be the most likely outcome of this event on the locations near the space center? increase in number of restaurants and decrease in unemployment increase in tourism and decrease in use of space technologies in homes increase in unemployment and decrease in profit made by local businesses increase in profit made by construction companies and decrease in use of space technologies in homes Question 15 (Multiple Choice Worth 2 points) [OU.01]The diagram below shows the distance traveled by two light waves in 1 second. Based on the diagram, which of these conclusions is correct about the two waves? They have equal frequencies. They have equal wavelengths. The amplitude of Wave 2 is double the amplitude of Wave 1. The frequency of Wave 2 is double the frequency of Wave 1. Question 16 (Multiple Choice Worth 2 points) [OU.04]The table below compares three galaxies.
1 2 3 Type of galaxy Shape Force holding it together Type of matter present Spiral Pinwheel Gravitational Stars, gas, and dust Elliptical Round or oval Electrical Electrons and protons Irregular Undefined Gravitational Stars, gas, and dust The information about galaxies is correct only in Column 1 Column 2 Column 1 and Column 3 Column 2 and Column 3 Question 17 (Multiple Choice Worth 2 points) [OU.04]The picture below shows a galaxy with an elongated center. © NASA spiral elliptical irregular barred spiral Question 18 (Multiple Choice Worth 2 points) [OU.01]One scientist is using an electromagnetic wave to map the dust between stars. The electromagnetic wave has shorter wavelength than radio waves but longer wavelength than visible light. What electromagnetic wave is the scientist using? X-ray Infrared light Gamma ray Ultraviolet radiation Question 19 (Multiple Choice Worth 2 points) [OU.03]The table below shows the initial masses of four stars. Name of Star Star 1 Star 2 Star 3 Star 4 Initial mass of star (in Solar mass) 9 0.9 5 0.3 Which of these stars will stay on the main sequence for the longest time? Star 1 Star 4 Question 20 (Multiple Choice Worth 2 points) [OU.01]Which of these waves has the greatest wavelength? Question 21 (Multiple Choice Worth 2 points) [OU.04]Which of these models would best represent the Big Bang Theory? burst an inflated balloon with a pin blow a balloon with spots marked on it press a piece of raisin bread in the palm keep a raisin bread in the open for a week Question 22 (Essay Worth 3 points) [OU.02] In your own words, explain why the period between 1960 and 1969 is regarded as the busiest period in space exploration history. What are two technological advancements or discoveries from this time period? Question 23 (Essay Worth 3 points) [OU.04] In your own words, explain how the Doppler Effect led to the development of the Big Bang Theory. YOU MUST CHECK THE BOX BELOW PRIOR TO SUBMITTING YOUR EXAM! Check this box to indicate you are ready to submit your exam Bottom of Form Top of Form Current course: Bottom of Form Instructors monitor ALL areas of a student’s account Student e-mail accounts are to be used for FLVS course-related email only and not for general introductions or spamming of people in your address book. Please remember to click the Logoff link when you have completed your work in the course. Related Help Center Topics Taking Exams Proctored Exams Question Types |
