Mod 4 Quiz Water Quality and Availability

How much of the water on Earth (liquid, solid or gas) is fresh? 96.5% 1.75% 1.7% 3.5%

3.5%

What is the number of people on Earth that lack access to clean freshwater? 780 million 380 million 3.4 billion 3.4 million

780 million

Approximately how much water does it take to produce one pound of grain-fed beef? 8 gallons 8000 gallons 80 gallons 800 gallons

800 gallons

Globally, 70% of freshwater that humans use is used for: Domestic use Agriculture Industry Food system

Agriculture

The Las Vegas Water Authority seeks to build a 200-mile long pipeline to bring water to Las Vegas from: Lake Mead Basins in Eastern Nevada The Pacific Ocean The Colorado River

Basins in Eastern Nevada

Which of the following goods requires the most water to produce, per pound of material? Steel Grain-fed beef Cotton Grass-fed beef

Cotton

Considering the global distribution of water for human use, which of the following might be the single most effective approach of reducing demand on global water supplies? Water-efficient home washing machines Dry industrial production Efficient agricultural irrigation Low-flow toilets

Efficient agricultural irrigation

What process fluxes water from oceans (part of the hydrosphere) to the atmosphere? Infiltration Transpiration Evaporation Precipitaiton

Evaporation

Some Kansan farmers have committed to preserving the aquifer by reducing _______ by 20% over the next five years. Crop spraying Soil cultivation Crop production Groundwater pumping

Groundwater pumping

Developing countries often lack the ____________ necessary to ensure a reliable, clean supply of freshwater. Political stability Precipitation Land area Infrastructure

Infrastructure

Scientists with the Kansas Geological Survey say the Ogallala aquifer is not recharging with water due to: Paved surfaces Industrial overuse Domestic overuse Lack of precipitation

Lack of precipitation

How much water is lost from the global water cycle each year? 20% 10% 5% None

None

How much water is lost from the global water cycle with human input each year? None 10% 20% 5%

None

The Ogallala aquifer is the largest freshwater aquifer in ________. Australia North America California Africa

North America

What is necessary to ensure the Ogallala aquifer's water supply can be used sustainably? Prevention of precipitation runoff Cease all irrigation Cessation of groundwater pumping and rotation of crops Reduction of water usage and improvement of water policy

Reduction of water usage and improvement of water policy

Which country has the highest water use per capita on Earth? China United States India United Kingdon

United States

Iowa's landscape drainage system has been changed most significantly by the extensive development of _________. bridges parking lots roads agricultural tile systems

agricultural tile systems

Humans' psychological aversion to "recycled" water is kind of silly because ___________________. humans have evolved to drink only bottled water bottled water is recycled, but tap water isn't tap water is recycled, but bottled water isn't all water is recycled from somewhere

all water is recycled from somewhere