What is the one property of dark matter we can measure? a)Color. b) Mass. c) Weight. d) Temperature. e) Chemicalcomposition
How are the tiny temperature and density fluctuations in thecosmic microwave background (CMB) related to galaxies and clustersof galaxies we see in the present-day universe? a) There is norelationship. b) Warmer and denser regions in the CMB contain theleast amount of dark matter. c) Warmer and denser regions in theCMB hide galaxies and galaxy clusters from our view. d) Warmer anddenser regions in the CMB do not have enough hydrogen and helium tomake present-day galaxies and galaxy clusters. e) Warmer and denserregions in the CMB are locations where galaxies and galaxy clustersare most likely to form
