Directions (51–65): Record your answers in the spaces provided in your answer booklet. Some questions may require the use of the 2011 Edition Reference Tables for Physical Setting/Earth Science.
Base your answers to questions 51 through 53 on the data table below and on your knowledge of Earth
science. The data table lists four constellations in which star clusters are seen from Earth. A star cluster is a group of stars near each other in space. Stars in the same cluster move at the same velocity. The length of the arrows in the table represents the amount of redshift of two wavelengths of visible light emitted by these star clusters.
Write the chemical symbol for the element, shown in the table, that absorbs the two wavelengths of light.