Which evidence suggests that several mass extinctions have occurred during earth's history?

fossils provide information about water level and temperature.
many fossils demonstrate that organisms have changed over time.
fossils of the same species have been found on distant continents.
many fossils of organisms that are no longer living have been discovered.

Describe the change in phase and temperature as water moves from the oceans to the atmosphere and then returns to earth again as rain. a) evaporation : temperature increases; condensation : temperature decreases; precipitation (rain) : temperature decreases b) evaporation : temperature increases; condensation : temperature decreases; precipitation (rain) : temperature increases c) evaporation : temperature decreases; condensation : temperature decreases; precipitation (rain) : temperature decreases d) evaporation : temperature increases; condensation : temperature increases; precipitation (rain) : temperature decreases