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