Which one of the following statements concerning volcanic blocks and bombs is true?
A. blocks are broken fragments of solid rocks; bombs have smaller sizes than lapilli
B. bombs are guided to Earth by laser beams; blocks fall anywhere
C. bombs are ejected as magma lumps; blocks are ejected as solid fragments
D. bombs and blocks are both smaller than lapilli and cinders
Answer:C
Which one of the following statements concerning volcanic blocks and bombs is true?
A. blocks are broken fragments of solid rocks; bombs have smaller sizes than lapilli B. bombs are guided to Earth by laser beams; blocks fall anywhere C. bombs are ejected as magma lumps; blocks are ejected as solid fragments D. bombs and blocks are both smaller than lapilli and cinders