What condition results in magma cooling and forming a “glassy” igneous rock? a. extremely slow cooling b. cooling in the presence of oxygen

Which of the layers of the earth has the following three characteristics? i. it is made of molten rock. ii. it has currents that are constantly moving. iii. earth’s plates float on top of its currents.

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

After considering options, a student using the problem-solving process should next