after chlorofluorocarbons were banned, which class of chemicals was used in their place?\na) methane\nb)…

after chlorofluorocarbons were banned, which class of chemicals was used in their place?\na) methane\nb) sulfur dioxide\nc) carbon dioxide\nd) hydrofluorocarbons\nquestion 16 (5 points)\nwhich principle states that rock fragments in sedimentary layers must be older than the surrounding sediments?\na) principle of inclusions\nb) principle of cross - cutting relationships\nc) principle of unconformity\nd) principle of superposition

after chlorofluorocarbons were banned, which class of chemicals was used in their place?\na) methane\nb) sulfur dioxide\nc) carbon dioxide\nd) hydrofluorocarbons\nquestion 16 (5 points)\nwhich principle states that rock fragments in sedimentary layers must be older than the surrounding sediments?\na) principle of inclusions\nb) principle of cross - cutting relationships\nc) principle of unconformity\nd) principle of superposition

Answer

Answer:

  1. D) Hydrofluorocarbons
  2. A) Principle of inclusions

Brief Explanations:

  1. Hydrofluorocarbons (HFCs) were used as replacements for chlorofluorocarbons (CFCs) as they have less impact on the ozone - layer.
  2. The principle of inclusions states that rock fragments (inclusions) within a sedimentary layer must be older than the surrounding sedimentary rock in which they are found.