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Distribution of water on earth
Distribution of water on earth
Standard: 8.E.1.1 Explain the structure of the hydrosphere including:
- Water distribution on earth
- Local river basin and water availability
Introduction: Water is one of the most common substances on the surface of the Earth. Earth's water is always moving. Water is the only substance on Earth that occurs naturally as a solid (ice), liquid (water), and a gas (water vapor).
Essential Question: Explain how water is distributed on Earth.
Key Vocabulary: salt water, freshwater, groundwater, aquifer, water table, reservoir, hydrosphere, potability
- vocabulary may be practiced using quizlet.com
As you watch the video, record your thoughts and reactions to the stories you hear. You may do this in writing or through a short video.
A World Without Water
A World Without Water
The struggle for this precious resource and the battle for its ownership is explored through compelling stories of families living in Bolivia, Detroit, Dar Es Salaam and Rajestan. As the background to these stories we explore the conflicts over the future of water and see how even those living in the relatively water-rich UK hold the survival of the planet in our hands.
Complete the Distribution of Water on Earth Notes using the presentation below.
Copy of Distribution of Water on Earth.pptx- In the first bar, notice how only 2.5% of Earth's water is freshwater - the amount needed for life to survive.
- The middle bar shows the breakdown of freshwater. Almost all of it is locked up in ice and in the ground. Only a little more than 1.2% of all freshwater is surface water, which serves most of life's needs.
- The right bar shows the breakdown of surface freshwater. Most of this water is locked up in ice, and another 20.9% is found in lakes. Rivers make up 0.49% of surface freshwater. Although rivers account for only a small amount of freshwater, this is where humans get a large portion of their water from.
Need a little more help with how water is distributed? Watch this Crash Course Video
earth-the_water_planet.pdfREADING
READING
After reading the article to the left complete the form below. Be sure to support your answers with evidence.
Click on USGS Earth's Water to learn more about the distribution of water on Earth. Use this site to help complete the four water cycle concept maps.
Properties of water
Properties of water
Introduction: Looking at water, you might think that it's the most simple thing around. Pure water is practically colorless, odorless, and tasteless. But it's not at all simple and plain and it is vital for all life on Earth. Where there is water there is life, and where water is scarce, life has to struggle. Water has many unique properties that impact the role it plays on the Earth.
Essential Question: How do water's unique properties impact the role it plays on Earth?
Key Vocabulary: polarity, cohesion, adhesion, surface tension, density, specific heat, vaporization, solvent
As you review the presentation below, create a foldable with 8 flaps. Fill in information on each flap about the properties of water.
Copy of Copy of Copy of Properties of water 2015.pptxFor additional information on each water's unique properties click on the following links:
Water Quality Indicators
Water Quality Indicators
Standard: 8.E.1.3 Predict the safety and potability of water supplies in North Carolina based on physical and biological factors.
Essential Question: How do each of the six water quality indicators predict the safety and potability of water supplies in NC?
Introduction: The health of a water system is determined by the balance between physical, chemical and biological variables. Physical variables include temperature, turbidity, and water movement. Chemical variables include dissolved oxygen and other gases, pH, nitrates, and salinity. Both natural and man-made forces are constantly changing these variables. Freshwater systems are of particular concern because they are the source of most of the potable water consumed by humans. Testing for the occurrence of chemicals and other factors that can influence water quality, such as nutrients and pesticides in water resources is a normal part of public health maintenance and stewardship of freshwater resources. Water that is safe to drink is called potable water, or drinking water, in contrast to safe water, which can be used for bathing or cleaning. In the United States, the Environmental Protection Agency sets maximum levels for the 90 most commonly occurring contaminants.
Key Vocabulary: temperature, dissolved oxygen, pH, nitrates, bio-indicators, turbidity
Water Quality Stations.pdfComplete the stations to the left on a separate sheet of paper or type your answers. Be sure to answer all questions in complete sentences and label which station you are completing.
For example:
Station 1
1. answer the question
2. answer the question
Station 2
1. answer the question
Use the links in the document below to complete the Water Quality Virtual Lab.
River Basins and Watersheds
River Basins and Watersheds
Introduction: A river basin is the portion of land drained by a river and its tributaries. It encompasses the entire land surface drained by the various streams and creeks that flow downhill into one another, and eventually into one river. The final destination of the water drained by a river basin is an estuary or an ocean. A river basin sends all the water falling on the surrounding land into a central river and out to the sea.
Key Vocabulary: river basin, watershed, tributary
Essential Question: Describe a river basin and the role river basins play in the hydrosphere.
Review the presentation below about River Basins and Watersheds.
Using the Discover North Carolina's River Basins booklet below answer the related questions that can be found in your notebook.
discover-nc-river-basins-booklet.pdfRead the following infographic and answer the questions.
Copy of WatershedsRiverBasinsandEstuaryInforgraphic.pdfEstuaries
Estuaries
Use the PowerPoint to the left to complete guided notes.
Human Impacts on the Hydrosphere
Human Impacts on the Hydrosphere
Standard: 8.E.1.4 Conclude that the good health of humans requires:
- Monitoring of the hydrosphere
- Water quality standards
- Methods of water treatment
- Maintaining safe water quality
- Stewardship
Essesntial Question: How does human activity within a watershed impact the overall health of the hydrosphere?
Key Vocabulary: point source pollution, non-point source pollution, stewardship, biomagnification,
Create notes for the following presentation.
Oceanography
Oceanography
Introduction: Traditionally, oceanography has been divided into four separate but related branches: physical oceanography, chemical oceanography, marine geology, and marine ecology. Physical oceanography deals with the properties of seawater (temperature, density, pressure, and so on), its movement (waves, currents, and tides), and the interactions between the ocean waters and the atmosphere. Chemical oceanography has to do with the composition of seawater and the biogeochemical cycles that affect it. Marine geology focuses on the structure, features, and evolution of the ocean basins. Marine ecology, also called biological oceanography, involves the study of the plants and animals of the sea, including life cycles and food production.
Standard: 8.E.1.2 Summarize evidence that Earth's Oceans are a reservoir of nutrients, minerals, dissolved gases, and life forms.
Essential Question: Explain the evidence that Earth's Oceans are a reservoir of nutrients, minerals, dissolved gases, and life forms.
Key Vocabulary: upwelling, Desalination, Deep ocean technology, Sustainable (fishing), Commercial fishing, SONAR, Continental shelf, Continental slope, Abyssal plain, Midocean Ridge, Deep ocean trench, Continental rise, Seamount, Continental margin
Complete the Ocean Notes using the PowerPoint below.
Notes_-_the_Ocean.pptxWrite a summary of each of the videos.
Complete the Under the Sea Stations using the following resources.
8-e-1-2-oceans-stations.pdfUse for Stations 1-4
oceans-as-a-resource-infographic-analysis1.pdfInfograph for Station 4
zones_of_the_oceans-stations-5-8.pdfUse for Stations 5-8
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