Facts about water H2O water science for kids
How much water is there on Earth?
Scientists estimate there is about 326 million trillion gallons of water. Over 75 percent of the Earth's surface is water. 96.5 percent of the earth's water is located in oceans and seas.
Almost 69 percent of the world's freshwater supply is located in glaciers and permanent snow near the Earth's north and south poles.
Over 30 percent of the known freshwater is contained underground.
The remaining amount of freshwater(less than 1%) is located in rivers, ponds, lakes, swamps and water in the atmosphere.
Without water, there would be no life on Earth. Many space missions have a goal of finding water. Why, because where there is water, there is a chance of life.
Water consists of 3 phases including liquid water, solid ice and water vapor gas (clouds and fog). We consider these 3 phases the main path of the water cycle.
Liquid water has two categories including freshwater and saltwater.
A shower uses between 2 and 5 gallons of water per minute.
The average person in America uses about 90 gallons of water per day.
The average person in Mali uses about 3 gallons of water per day.
Clean water to drink is not readily available around the world. Some places like cities surrounding the Great Lakes in the United States, have plenty of freshwater available to drink.
Water flowing over Niagara Falls alone every minute is enough drinking water for 55 million people.
Water is made up of two parts hydrogen and one part oxygen. These are the most abundant elements in the universe.
In its natural state, water has a pH of 7, which means it is neutral (not an acid or an alkaline). Water affected by pollution such as acid rain, mine runoff and farm runoff, however, typically have a pH lower than 7. Salt water and runoff and groundwater near limestone have a pH higher than 7.
Water is the only substance that can change phases from solid to liquid to gas in a small range of naturally occurring temperature.
Water boils at 212 degrees Fahrenheit.(100 degree Celsius)
Water freezes at 32 degrees Fahrenheit. (0 degrees Celsius).
Water is really important to life on the planet Earth.
Learn more facts about water to help kids learn about science here.
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21 фев 2022
