CH 27.3 27.4 Flashcards
Infiltration
The process where water enters earth and becomes ground water
Water table
The level below the ground is saturated with water
Aquifer
A body of permeable rock which can contain or transmit ground water
Porosity
percentage of materials total volume that is pore space
Absolute Dating
the process of determining an exact age on a specified chronology
relative dating
the science of determining relative of past events without finding the absolute age
super position and undisturbed sequence of rock layers youngest on top oldest on bottom
principle of superposition
Gaps in the rock record during which erosion accured or deposition was absent
unconformity
Fossil
the remains or impression of a prehistoric organism preserved in petrified form or a mold or cast in rock
What percentage of water on earth is salt water?
87 percent
what percentage of water on earth is freshwater?
3 percent
where is the majority of freshwater found?
glaciers
Where is the smaller percentage found of freshwater found.
Lakes rivers groundwater
What is precipitation?
when water vapor cools and condenses
what is runoff?
When water runs off land surface