If a scientist knows the relative age of a fossil, he can also know a. the relative age of the rock where it was found. b. how it became extinct. c. how long the organism was alive. d. the type of climate from which it came.

Match the correct terms to their descriptions a system in which only energy but not matter is exchanged frozen water in snow part of geosphere that includes only soil a thin layer between the troposphere and the stratosphere cryosphere tropopause closed system pedosphere