Traditionally, floodplains were very important for development of human habitation because
Rivers overflowed their banks, depositing nutrient rich sediments for agriculture
Dams are used for which of the following
Create reservoirs for drinking water
Power turbines that generate electricity
In an artesian well
Water under pressure can rise to the surface without pumping
The porosity of soil is a measure of
How quickly it drains
Of the world's freshwater, roughly __ percent is used for agriculture, __ percent is used for industry, and __ percent is for household use
70, 20, 10
Base saturation of the soil is a measure of the
Percentage of water to particles in a sample
The following are characteristics of confined aquifers
-They are surrounded by layers of impermeable material
-They may contain water is is 10,000-20,000 years old
Places where water aquifers naturally percolates up to the ground surface known as
Springs
Aqueducts present problems in the areas in which they are located. This may be due to the following:
-Diversion from the natural river channel flow
-Loss of water due to evaporation
-Political problems due to location of water bodies
The infiltration of pollutants into groundwater
Is common in areas with sandy soils because water flows through them easily
Use of water from the Ogallala aquifer in the Great Plains region of the US is not sustainable because
It is recharged at a rate that is slower than it is used
Saltwater intrusion into freshwater aquifers may be a problem in
Coastal areas
Sedimentary rock may be formed
-By sediments deposited on a lake bottom
-By sediments deposited on an ocean floor
-By sediments deposited in a stream -As a result of compression by overlying sediments
In an aquifer
Groundwater is found in spaces between sediments and rock layers
Gray water is suitable for
Watering plants
Freshwater accounts for what percentage of total water in the world
3%
The layer of soil on the surface of the Earth is on top of the
Crust
Hydrologic agriculture
Uses a nutrient rich solution
Uses little to no pesticides
The difference between chemical and physical weathering of rock is that
Chemical weathering results in new substances
Erosion of soil can be accelerated by which practices?
Road building
Agriculture
Logging
Construction
When surface area of rock is increased
The rock weathers more rapidly because there are greater surfaces on which chemicals can work
The problem with the distillation method of desalination is that
It is energy intensive
Oligotrophic lakes
Have low productivity due to low amounts of nutrients
Select the rock type correctly connected with its mode of origin
Igneous - Liquid magma
The Theory of Plate Tectonics states that
Earth's lithosphere is divided into plates, which move
The following scenario describes huge changes in the Aral Sea in Central Asia
-Water was diverted for irrigation, decreasing water levels and increasing salinity
-Dust storms were created from sediment on the dried seafloor
Half of the amount of desalinated water is produced in
The Middle East
Furrow irrigation
Involves digging trenches and filling them with water
The effect of temperature and rainfall on the soil is that
Soil is nutrient poor in the humid tropics because of warm temperatures and high rain creating conditions that lead to rapid decomposition of organic matter
Overall, the greatest % of household water used in the US
Is for flushing toilets