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.

Question

Quizplus · Accepted Answer

Bombs are ejected as molten or semi-molten lumps of magma that solidify in the air, forming shapes that can vary from spherical to streamlined. Blocks, on the other hand, are fragments of solid rock that are broken apart during an eruption and can range in size from a few centimeters to several meters.

Which One of the Following Statements Concerning Volcanic Blocks and Bombs