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Question: Which one of the following statements concerning volcanic blocks and bombs is true?

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  1.  blocks are broken fragments of solid rocks; bombs have smaller sizes than lapilli
  2.  bombs are guided to Earth by laser beams; blocks fall anywhere
  3.  bombs are ejected as magma lumps; blocks are ejected as solid fragments
  4.  bombs and blocks are both smaller than lapilli and cinders

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3. Bombs are ejected as magma lumps; blocks are ejected as solid fragments

Statement concerning volcanic blocks and bombs is true is "bombs are ejected as magma lumps; blocks are ejected as solid fragments".

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