11 multiple choice 1 point\nthe end to different geologic eras the phanerozoic eon are often marked by…

11 multiple choice 1 point\nthe end to different geologic eras the phanerozoic eon are often marked by what?\nwidespread mass extinctions\nvolcanic activity\nthe birth of a new kingdom\nice ages\n12 multiple choice 1 point\nwhich of these facts is the best supporting evidence that the universe is expanding?\nthe galaxies can spin to form eddies\nthe universe is filled with galaxies of different sizes\nthe stars vary in chemical composition\nthe galaxies are moving away from each other

11 multiple choice 1 point\nthe end to different geologic eras the phanerozoic eon are often marked by what?\nwidespread mass extinctions\nvolcanic activity\nthe birth of a new kingdom\nice ages\n12 multiple choice 1 point\nwhich of these facts is the best supporting evidence that the universe is expanding?\nthe galaxies can spin to form eddies\nthe universe is filled with galaxies of different sizes\nthe stars vary in chemical composition\nthe galaxies are moving away from each other

Answer

Brief Explanations:

For question 11, throughout geological history, the end of geologic eras in the Phanerozoic Eon is commonly associated with mass - extinctions that wipe out a large number of species. For question 12, the observation that galaxies are moving away from each other is a key piece of evidence for the expansion of the Universe, as described by Hubble's law.

Answer:

  1. widespread mass extinctions
  2. The galaxies are moving away from each other