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
What is infiltration?
when water enters earth and becomes groundwater
What is transpiration?
plants release water vapor into the atmosphere through there leaves
what is evaporation?
when water enters the atomophere as water vapor
what is condensation
water vapor collides with other water vapor molleculles to form water droplets
what is the water cycle
water on land that goes to the atmosphere and back to land
What is a unsaturated zone for groundwater storage
a poruous area where water easily passes through
what is a saturated zone for ground water storage
beneath the unsaturated zone, where water completely, fills the pore space
what is a water table
upper boundary of saturated zone
what does it mean when its permeable
easier
