Plumbers install these pipes in straight lines, 90 degree angles, or slight downward slopes to facilitate easier flow. Each water appliance has its own intake pipe, which branches off from the cold water pipes to supply the particular appliance with cold water. To get to every appliance, these pipes need to run throughout the home.
The end of this path empties out into the water heater. When water from the main line floods the tank, a sensor in the base of the tank sends a message to the heating element. The heating element applies heat the tank, warming up its contents in the process. Water heaters take time to heat water, but they also preserve a quantity of hot water in the tank for immediate use.
After warming the water, the water heater shoots the it out into the hot water service lines. The hot water service lines run parallel to the cold water service lines.
They never collide or intersect. Without the valve in place to block it, water flows out of the faucet and into the sink. Every water appliance with hot and cold water settings contains intake pipes that connect with the hot and cold water supply lines.
Two completely different living situations, two completely different mechanisms:. Since a well is underground, there needs to be a mechanism to get that water out and up into your home.
The pressure tank that the pump fills is airtight, and as water gets pumped in it creates a pressure against the air within the tank As that water supply is used, the pump will kick-in to pump more into the tank to keep the pressure consistent. One minor flaw: this system relies exclusively on electricity. These reservoirs collect millions upon millions of gallons of water throughout the year and are replenished from other bodies of water and rainwater.
Norway, Brazil, and the Democratic Republic of Congo all get more than 90 percent of their electricity from hydroelectric power plants. Plans for a new hydroelectric plant in the Democratic Republic of Congo may link homes and businesses in Europe with the African power supply. Also called hydroelectric energy or hydroelectric power. Usually rivers enter another body of water at their mouths.
Also known as petroleum or crude oil. Also called "the country. The audio, illustrations, photos, and videos are credited beneath the media asset, except for promotional images, which generally link to another page that contains the media credit.
The Rights Holder for media is the person or group credited. Caryl-Sue, National Geographic Society. Dunn, Margery G. For information on user permissions, please read our Terms of Service. If you have questions about how to cite anything on our website in your project or classroom presentation, please contact your teacher. They will best know the preferred format. When you reach out to them, you will need the page title, URL, and the date you accessed the resource.
If a media asset is downloadable, a download button appears in the corner of the media viewer. If no button appears, you cannot download or save the media. Text on this page is printable and can be used according to our Terms of Service. Any interactives on this page can only be played while you are visiting our website. You cannot download interactives. For thousands of years, humans have modified the physical environment by clearing land for agriculture or damming streams to store and divert water.
As we industrialized, we built factories and power plants. For example, when a dam is built, less water flows downstream.
This impacts the communities and wildlife located downstream who might depend on that water. Use these resources to teach your students how humans modify the physical environment and the compounding impacts those changes have.
However, over time, there has been a shift in demand for cheaper and cleaner fuel options, such as the nonrenewable energy source of natural gas, and renewable options like solar power and wind energy. Each energy resource has its advantages and disadvantages. Explore nonrenewable and renewable options with this collection on energy resources. Hydroelectric energy is a form of renewable energy that uses the power of moving water to generate electricity.
A dam is a structure built across a stream or river to hold water back. Dams can be used to store water, control flooding, and generate electricity. Join our community of educators and receive the latest information on National Geographic's resources for you and your students. Skip to content. Twitter Facebook Pinterest Google Classroom.
Article Vocabulary. Thursday, December 15, Hydroelectric energy is made by moving water. Hydroelectric engineers just dam it. Photograph by Volkmar K. Bay Area. Bonneville Dam. Great Depression. Herbert Hoover. Also known as hydroelectricity. Industrial Revolution. New Deal. Three Gorges Dam.
Also called a cascade. Media Credits The audio, illustrations, photos, and videos are credited beneath the media asset, except for promotional images, which generally link to another page that contains the media credit. Last Updated Dec. Media If a media asset is downloadable, a download button appears in the corner of the media viewer. Text Text on this page is printable and can be used according to our Terms of Service. Interactives Any interactives on this page can only be played while you are visiting our website.
Related Resources. Human Modification of the Environment. View Collection. Energy Resources. Hydroelectric Energy. View Article.
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