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What is water, where is it found, what does it do, and how has it changed over time?
This lesson expands upon information introduced in the discussion of water chemistry. It investigates specific features of water and the distribution of water on earth. It also examines the motion of water in relation to currents, waves and tides. Finally, it investigates how the water on earth has changed over time, but is now quite stable
1. Composition & Water Distribution - What materials are found in water and how are different types of water spread around the world?
2. Dynamics and Processes - Describe the forces that influence waves, currents, and tides.
3. History - How has the composition, distribution, and dynamics/processes changed over the history of the earth?
Warm Ups:
The Unit Title - key definitions to establish learning goals for the unit
DO and BOD - students identify features of a graph with multiple types and units of data. Information from the graph will also be interpreted. Presentation also includes a brief overview of BOD measurement and the process of wastewater treatment.
Like a Concussion - given examples of energy transfer, students review conduction, convection and radiation.
What Does What? - students review the causes/effects of the hydrosphere's dynamic interaction with the other spheres.
Identify Sources - students review the origins of water and the major changes that occured over the history of the earth.
Instruction, Presentations, Assignments, Activities, etc:
Notes -Composition of the Hydrosphere
Chart - Dynamics and Processes of Water - examples,diagrams and other "brainstormed" information should be added to handout in a large group setting. Suggested found on pg2
Graph - Distribution of Water - students annotate a pie chart illustrating the distribution of saltwater, frozen fresh and liquid fresh water around the world. They also identify examples of each type.
Eutrophication occurs when a body of water receives an excessive nutrient load, particularly phosphorus and nitrogen. This often results in an overgrowth of algae. As the algae die and decompose, oxygen is depleted from the water, and this lack of oxygen in the water causes the death of aquatic animals, like fish. It also blocks light and covers submerged plants, reducing their photosynthesis. It can eventually lead to bodies of water filling in.
Timeline - History of Water - a diagram the illustrates the formation, early filling of basins, salination, astronomical contributions, photosynthesis (BIFs)
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