1. when rocks undergo changes in the composition as a result of chemical reactions it is called\nchemical…

1. when rocks undergo changes in the composition as a result of chemical reactions it is called\nchemical weathering.\nphysical weathering.\n\n2. a minerals hardness is classified by\nmineral scale.\nsilicate scale.\ngemological scale.\nmohs scale.\n\n3. a mineral that contains a useful substance that can be mined for profit is called

1. when rocks undergo changes in the composition as a result of chemical reactions it is called\nchemical weathering.\nphysical weathering.\n\n2. a minerals hardness is classified by\nmineral scale.\nsilicate scale.\ngemological scale.\nmohs scale.\n\n3. a mineral that contains a useful substance that can be mined for profit is called

Answer

Brief Explanations:

  1. La alteración química de las rocas se produce cuando sufren cambios en su composición debido a reacciones químicas.
  2. La dureza de un mineral se clasifica según la escala de Mohs, que establece una serie de minerales de diferentes durezas para comparar.

Answer:

  1. chemical weathering.
  2. Mohs scale.