In which layer of the atmosphere are the particles so far apart that they can travel hundreds of kilometers without colliding with each other? a. exosphere b. troposphere c. mesosphere d. thermosphere

There is only one climate type in motion across the world at a time

One of the main reasons societies settled along rivers in the neolithic era was because a) the village elders demanded it. b) the land there was more valuable. c) it was more safe and secure there. d) it provided irrigation for farming.

Lomexico, central america, and the caribbean: mastery testselect the correct answer. which of the following was the leading cause of death among native americans after the arrival of europeans? a. conquistadorsb. diseasec. starvationd. warreset