CH 27.3/.4 Flashcards
(32 cards)
youngest rocks appear on the top while the oldest rock appears on the bottom
Principle of superposition
Placing objects in their proper order of time
relative dating
a rock unit that can transfer eater through its pore space
aquifer
The amount of pore space a material has
porosity
assigning an exact age to an organism
absolute dating
gaps in rock record during which erosion or or deposition occurred
uncomformity
upper boundary of the saturated zone
water table
remains of an organism
fossil
when water enters the earth and becomes groundwater
infiltration
laws of nature act the same today as they did in the past
uniformtarianism
what percentage of water on earth is salt
97%
what percentage of water on earth is freshwater
3%
where is the majority of freshwater found
glaciers
where is the smaller percentage of freshwater found
lakes and rivers
what is precipitation
rain snow sleet and hail
what is runoff
water runs off
what is infiltration
water seeps into the earth and becomes ground water
what is transpiration
Plants release water vapor in to the sky
what is evaporation
water becomes water vapor
what is condensation
water vapor becomes water
what is water cycle
water goes up as vapor then comes down as precipitation
What is an unsaturated zone for groundwater
a porous area water passes through
what is the saturated zone for groundwater storage
beneath the unsaturated zone where water fills porous space
what is a water table
the upper boundary of the saturated zone
