What is the continuous movement of water between earth and its atmosphere.
100
Why must water be made potable?
What is it makes water safe to drink.
100
What is water pollution?
What is the introduction of chemical, physical, or biological agents into water that degrade water quality and adversely affect the organisms that depend on the water.
100
What are the three major uses for water?
What is residential use, agricultural use, and industrial use.
100
What does the drip irrigation system help do?
What is deliver small amounts of water directly to plant roots.
200
What is earth often called?
What is "the Water Planet".
200
What elements do water treatment remove?
What is mercury, arsenic, and lead.
200
What is point-source pollution?
What is pollution discharged from a single source.
200
What is surface water?
What is fresh water.
200
How does the drip irrigation system get water directly to plants roots?
What is through perforated tubing.
300
Why is water a renewable resource?
What is because it is circulated in the water cycle.
300
What is a pathogen?
What is organisms that cause illness or disease.
300
What are some examples of point-source pollution?
What is a factory, wastewater treatment plant, or a leaking oil tanker.
300
What are water sheds?
What is the area of land that is drained by a river.
300
How does water conservation help us?
What is it can help ensure that everyone will have enough water at a reasonable price.
400
What is the first stage of the water cycle?
What is evaporation.
400
Where a pathogens found?
What is in water contaminated by sewage or animal feces.
400
What is a Nonpoint-source pollution?
What is pollution from many different sources that are often difficult to identify.
400
What percent of the world is covered with water?
What is 71%.
400
What are the most widely used water conservation plans?
What is recycling of cooling water and waste water.
500
What are the three stages of the water cycle?
What is evaporation, condensation, and precipitation.
500
What are the steps in a common drinking water treatment method?
What is First Filtration, Coagulation, Second Filtration, Chlorination, Aeration, and Additional Treatment.
500
What are some examples of Nonpoint-source pollution?
What is a river polluted by runoff or if a farm, a road or any other land surface in a watershed is polluted, runoff from a rainstorm can carry the pollution to a near by river, stream, or lake.
500
How much of the water on the planet is salt water?
What is 97%.
500
What are benefits of a city's paying small businesses to conserve water?
What is this saves money for the city and businesses, and also makes more water available for other uses.