Add 2 drops of blue food coloring to the water and stir. Water quality awareness in urban environments lesson 1 1 lesson overview. Where is earths water located and in what forms does it exist. About 71 percent of the earths surface is watercovered, and the oceans hold about 96. Thisactivitywasdevelopedtogive participantsanunderstandingof earthswater how muchexists,what its like and whereit is found. For an estimated explanation of where earth s water exists, look at this. Distribution of water on the earths surface earth 103. However, of all the water on earth, more than 99 percent of earths water is unusable by humans and many other living things only about 0. Did you know that 71% of our earths surface is covered in sea water. People living in developed countries use a far greater proportion of the worlds water than people in less developed countries. Water distribution worksheet for grades 35 pdf subject. The distribution of water on earth lesson will correlate to other interdisciplinary areas. The distribution of water on, in, and above the earth. Jan 08, 2014 for the love of physics walter lewin may 16, 2011 duration.
Distribution of water on earth geosciences libretexts. Most water in the earths atmosphere and crust comes from the world oceans saline seawater. I know students are ready to work together with their elbow patterns to color their graphs to show 97% of the earths water is salt water and 3% is fresh water. Today, i open the lesson by showing a video on earth s water.
Over 97 percent of the water resources on earth is found in the ocean and other saline water sources, thus, only about 2. A drop in your cup 5teacher and youth education, 2015 california state content standards grade five earth sciences 3a. The middle bar shows the distribution of that three percent of all earths water that is freshwater. A good distribution system should satisfy the followings. Beaker 1 will represent the worlds water distribution in terms of fresh us salt water. Water distribution on earth national geographic society. First, measure out and pour into the beaker 970 ml of water. The report highlights the following aspects related to the world s water distribution. Water quality information earths water distribution. The earth has a finite amount of water, with most of the water being found in the oceans. Chapter 8 water distribution systems distribution system is a network of pipelines that distribute water to the consumers. As a class, we come up with, distribution of earths water. Earths water is finite, meaning that the amount of water in, on, and above our planet does.
The teacher guide describes our current understanding of water cycling and freshwater issues that affect natural and. Put salt into the remaining 970 ml in beaker to simulate ocean salt water unsuitable for human consumption. A one page worksheet called the genius challenge for students learning about the distribution of water. Relying only on popular news blurbs, press releases etc for writing articles can beis problematic and misleading. Scale, proportion, and quantity students conduct an investigation by using relative scales to describe the distribution of water on earth. Porosity the percentage of a materials volume that is pore space.
Pdf landwater distribution and the pearshape of the earth. The leftside bar shows where the water on earth exists. The distribution of water throughout the atmosphere and how it moves, changing. Earths water a map showing teacher guide lessonoverview. The oceans sea level has risen and fallen by hundreds of meters in response to melting ice during warm periods and expanding glaciers during ice ages. The middle bar shows the distribution of that three percent of all earth s water that is freshwater. This video is about water distribution on earth demonstration. The earth cleans and replenishes the water supply through the hydrologic cycle. Earths oceans contain 97% of the planets water, so just 3% is fresh water, water with low concentrations of salts. In the northern hemisphere, 61% of the total area is ocean. You can see how water is distributed by viewing these bar charts. Students know that the amount of fresh water located in rivers, lakes, underground. Second, the water in the mantle isnt water as h 2 o, rather it is the hydroxide oh content of a silicate mineral that isnt stable under the conditions of earth s surface where water h 2 o is stable.
It was shown that the average distribution of water was directly correlated to the average geoid heights with a correlation coefficient of. Our fresh water supplies are stored either in the soil aquifers or bedrock fractures beneath the ground ground water or in lakes, rivers, and. For an estimated explanation of where earths water exists, look at this. Water on earth moves between the atmosphere, land, and oceans in a journey known as the hydrologic or water cycle. The distribution of water on the earths surface is extremely uneven. Tectonic forces that lift or lower portions of the seafloor has also affected sea level. Apr 18, 2016 this video is about earth s water distribution. Next, students will pour 30 ml of vegetable oil into the beaker. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Lesson the distribution of water on earth betterlesson. In fact, over the past 400,000 years a small amount of time in earth s 4. Students know most of earths water is present as salt water in the oceans, which cover. This activity can be used at the beginning of a water unit to help develop an overview of earths water.
Bar chart showing the distribution of water on, in, and above the earth. Almost 80 percent of earths fresh water is frozen in ice caps and glaciers. Youve heard the phrase, and for water, it really is true. Aug 14, 2017 water distribution water is a finite source. Whatlivesinwinter,diesinsummer,andgrowswithitsrootupward. Conduct some research and fill in the appropriate distribution of the earths hydrosphere. Distribution of water on earth read earth science ck. Water falls from the atmosphere as snow, hail, or rain onto land and ocean. The movement of water around earths surface is the hydrologic water cycle. Water distribution crews tackle a water main break duration.
There is also water in the atmosphere, but this is a tiny. Water, one of earths most limited resources, is recycled over and over again. Students then explore the distribution of water on earth by completing an investigation. Pdf the aim of this report is to introduce the global concept of water, its importance and distribution. That leaves only one percent of the earths water available to us for our daily water supply needs. Rivers and basins are often compared not according to their static volume, but to their flow of water, or surface run off. But just how much water exists on, in, and above our planet. Start studying distribution of earths water6th grade science. Each page invites your learner to interactive with the subject to engage the information. Water quality information earths water distribution apec. Because earths water is present in all three states, it can get into a variety of environments around the planet. The water that was here billions of years ago is still here now. At the end of the lesson, students reflect and apply their new understanding of the distribution of water by creating and analyzing a circle graph.
Water scarcity is a problem now and will become an even larger problem in the future as water sources are reduced or polluted and population grows. Where is earth s water located and in what forms does it exist. Distribution of earths water6th grade science flashcards. The suns heat provides energy to evaporate water from earths surface water oceans, lakes, etc. The sun, many millions of kilometers away, provides the energy that drives the water cycle. The report highlights the following aspects related to the worlds water distribution. Geography of the ocean basins the world ocean is the predominant feature on the earth in total area. Explains the distribution of water around the world and the causes and consequences of water scarcity. About 71 percent of the earth s surface is water covered, and the oceans hold about 96. Distribution of the earths water major surface currents of the ocean. Of freshwater, 69% resides in glaciers, 30% underground, and less than 1% is located in lakes, rivers, and swamps. Students know most of earths water is present as salt water in the oceans, which cover most of earths surface.
These are the notes over fresh water, distribution of the earths waters, as well as the percentage of salt water to fresh water and the break downs of how where the fresh water is located and how much is available for human consumption, conservation methods. The distribution of water throughout the atmosphere and how it moves, changing between its solid, liquid, and gaseous forms, is a powerful vehicle for redistributing earths energy and influences the behavior of the planets weather, climate, and other environmental systems. They use data from their investigation to provide evidence that there is a. In fact, over the past 400,000 years a small amount of time in earths 4.
Not that much actually water covers 71% of the earths surface. Water distribution read earth science ck12 foundation. This lesson, the distribution of water on earth, begins with students brainstorming ways people use water and generating a top ten list. Water flows endlessly between the ocean, atmosphere, and land. Earths water lesson 1 how is water distributed on the earth. Second, the water in the mantle isnt water as h 2 o, rather it is the hydroxide oh content of a silicate mineral that isnt stable under the conditions of earths surface where water h 2 o is stable. Two percent of the earths water is stored as fresh water in glaciers, ice caps, and snowy mountain ranges. This is locked up in glaciers with only a small amount on the land surfaces lakes, rivers and streams.
Water distribution on earth where is water distributed on earth. In this video, dave campbell and keith hunter discuss how the earths water is distributed. Our fresh water supplies are stored either in the soil aquifers or. Looked at another way, only one percent of the water on the earths surface. The remaining 1% of earth s freshwater is found underground 0. The distribution of river runoff across the earth s surface is very uneven. The total volume of water in rivers is estimated at 2,120 km. They identify and calculate the distribution of water sources on earth, distinguish the properties of various forms of water, and recognize the cycling of water in and out of the atmosphere.
This 30 ml represents earths fresh water, about 3 percent of the total amount of water on earth. They are designed to adequately satisfy the water requirement for a combination of o domestic o commercial o industrial o fire fighting purposes. May 02, 2016 over 97 percent of the water resources on earth is found in the ocean and other saline water sources, thus, only about 2. Explain why water shortages are increasingly frequent throughout the world. In this activity, students create and analyze pie of pie graphs to better understand how earth s total and fresh water are distributed around the planet. It is important to understand the restricted accessibility of fresh water. A storage location for water such as an ocean, glacier, pond, or even the atmosphere is known as a reservoir. In this activity, students create and analyze pieofpie graphs to better understand how earths total and fresh water are distributed around the planet.
Earth is often called the blue planet, because of its abundance of liquid water. The remaining 1% of earths freshwater is found underground 0. Earths waterstudent capture sheet guiding questions how much waterison earth. Our nearest star directly impacts the water cycle by supplying the energy needed for. This activity can be used at the beginning of a water unit to help develop an overview of earth s water. Most fresh water is trapped as ice in the vast glaciers and ice sheets of greenland. Over 97 percent of the earths water is found in the oceans as salt water.
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