(earth science)
how can you tell if an igneous rock came out of a volcano or if it cooled underground in a magma chamber?

What is the mercury length of time for one revolution around the sun?

Witch of the following volcano hazards is made up of rocky particles about the size of a grain of sand

All of the following came out of china and were exchanged along the silk road, except a. papermaking b. block printing c. buddhism d. compasses select the best answer from the choices provided a b c d