Lava is
a. always produced during any volcanic activity.
b. molten rock that cools and hardens on earth's surface.
c. the most life-threatening volcanic product of any eruption.
d. all the same chemical composition, whether it is rhyolite or basalt

The lines marked by the letters a, b, and c on the map above represent a. chains of volcanoes b. earthquake fault lines c. thin strips of heavy forests d. major rivers that flow from north to south

Sandstones that form in aeolian (wind/desert) environments appear very different from other sandstones, such as those formed in a beach/ shoreline environment and in rivers on land. give three identifying properties for each of the three sandstones that would tell a geologist which depositional environment they formed in. consider things such as the relationship between transportation and grain size, shape, roundness, sorting, fossils and composition.

How does central place theory explain patterns in the size and distribution of cities?