Lesson Plan LESSON TITLE: Water and Society. SUBJECT AREA: Science GRADE LEVEL: 7th TIME ALLOCATION: 6, 50 minute periods OBJECTIVES: Given a brief lecture on water’s role in society, importance in today’s world, and asked the question of how water is retained in aquifers, the 7th grade students will initiate an investigation to determine why groundwater collects in certain underground areas. Given clay, soil, gravel, and sand, the 7th grade students will test and distinguish the permeability of each material. Given clay, soil, gravel, and sand, the 7th grade students will determine the porosity of each material. After calculating the permeability and porosity of clay, soil, gravel, and sand, the 7th grade students will compose a physical representation of substrate layers that would make an effective aquifer. Given time in the computer lab to research different perspectives of water usage of the Great Lakes, the 7th grade students will complete a webquest to augment their understanding of the subject and form an opinion, as well as gather resources to support their argument. Given information and resources about issues surrounding aquifers, water’s role in society, and social issues pertaining to water, locally, nationally, and worldwide, the 7th grade students will debate the use of water in the Great Lakes from different perspectives. Day 1. Lecture on water and society, importance in the world, ask why water is collected in certain areas and not in others. Lead lab on permeability. Day 2. Lead lab on porosity Day 3. Students will make a physical representation of an effective aquifer using data gathered from labs. Students will use large plastic cups with holes in the bottom, and provided substrates. Each group will have time to construct their aquifer. Then each group will come up to the front to see which group’s aquifer holds the most water. Day 4. Lecture on social issues and conflict surrounding sources of fresh water. Introduce great lakes debate. Divy students into groups with sides to defend and support in debate. Day 5. In computer lab, do a webquest about the great lakes. Day 6. Debate over water usage of the great lakes. Attempt to reach some resolution. STANDARDS: Thermal energy is transferred as water changes state throughout the cycle. The cycling of water in the atmosphere is an important part of weather patterns on Earth. The rate at which water flows through soil and rock is dependent upon the porosity and permeability of the soil or rock. (Mogadore District Standards, Earth and Space Science, 7th grade, section 7, standard 4) BIG IDEA(S): Porosity and permeability of different materials and how these factors contribute to layers of an effective aquifer. The role water and access to fresh water plays in our society. GROUPING OF STUDENTS & RATIONALE: PRIOR KNOWLEDGE NEEDED/(THIS CAN BE FORMATIVE ASSESSMENT): Before the lesson students Students will be grouped into small groups. Since need to understand the hydrological cycle. Students need to we are doing a laboratory activity being in small understand the changing states of water as it moves through groups of 3-4 will allow each student to intently the biosphere. Students also need to understand properties observe the lab and individually engage in the of water, and properties of matter. inquiry process. MATERIALS: Gravel Clay STUDENT PROFILE (identify special characteristics of students relative to lesson) Students are mostly white middle class with easy access to Soil Sand Beakers Coffee filters Plastic cups with holes in the bottom Plastic cups without holes Stop watch water. Living in the great lakes region, these students may have an under appreciation for the vital place in society water plays. MODIFICATIONS TO MEET INDIVIDUAL STUDENT NEEDS: The lesson will be modified as needed for any student with special needs in the classroom. IDENTIFY ACADEMIC & RELATED CONTENT LANGUAGE : Aquifer- a wet underground layer of waterbearing or permeable rock or unconsolidated materials from which groundwater can be usefully extracted using a water well. Aquitard- a bed of low permeability along an aquifer Permeability- the measure of how easily water can flow through a material Porosity- the measure of the void spaces in a material such as soil, sand, or rock. It is measured as a percentage of open space or pores in a material INSTRUCTIONAL MODEL(S) & RATIONALE Direct instruction lecture, guided inquiry, role play. The lesson requires an introduction of general knowledge pertaining to the subject before students can launch an investigation to inquire as to why water gathers in certain places and not others. The inquiry aspect allows students to explore their own ideas and prove to themselves whether or not their hypotheses are false or not false. PROCEDURE AND ACTIVITIES (Name teaching strategy for each TIME ALLOCATIONS activity (cooperative learning, presentation teaching, guided inquiry, etc.) DAY ONE Objective- Given a brief lecture on water’s role in society, importance in today’s world, and asked the question of how water is retained in aquifers, the 7th grade students will initiate an investigation to determine why groundwater collects in certain underground areas. Given clay, soil, gravel, and sand, the 7th grade students will test and distinguish the permeability of each material 1. PRE-ACTIVITY: ADVANCE ORGANIZER Teaching strategy: Whole class discussion Students will be asked to think about their morning routine. Students will be asked to raise their hands and name activities they do in the morning. The teacher will write the activities on the board. Students will be asked to look at the list and see if any of the activities do not in some way involve water. Students will be asked to raise their hand and identify any activities they think do not involve water. The class will be asked to determine if the activity actually does 10 minutes not involve water or if there is a way to connect it to water in some way. After some discussion the class will be made aware that there is very little in our daily life that does not involve water in some roundabout way. The teacher will then pull up images of the Ogallala aquifer as ask the students why water collects in that area and not in other places. Students will be informed of the lesson’s objectives: Given a brief discussion on water’s role in society, importance in today’s world, and asked the question of how water is retained in aquifers, the 7th grade students will initiate an investigation to determine why groundwater collects in certain underground areas. Given clay, soil, gravel, and sand, the 7th grade students will test and distinguish the permeability of each material 3 minutes Transition: “So we’re asking the question; why does water collect in some places and not in others? What could we look at to figure this out?” Students will suggest several options, one of which will likely be related to the composition of the ground. Students will be told the definitions of the terms permeability and porosity. Students will then be directed to the lab. 2. ACTIVITY Students will divide into groups of three. Each group will designate one person to gather the materials, one person to pour the water, and one person to use the stopwatch and record the data. Each group will receive four plastic cups with holes in the bottom, four coffee filters, two beakers, one stop watch. There will be four buckets at the back of the room with four different materials in them, one with soil, one with clay, one with rocks, and one with sand. Each bucket will have a scoop or cup, and a 100 mL beaker for measuring the appropriate amount of material into each cup. Students will be given a lab sheet upon which to record their data. Each group will gather the appropriate amount of each material, 100 mL of each into the appropriate cups with the coffee filters in the bottoms. As well as gathering 100 mL of water into a beaker. They will take them back to their table. The students will then carefully hold one cup of material over an empty beaker. They will then start the timer as they slowly pour the 100 mL of water into the cup. The students will stop the timer when all of the water has trickled through the material. The students will repeat this three more times with the other materials, recording how long it takes for the 100 mL of water to drain through each material. Students will use dump the water used each time and use fresh water for each experiment so as to reduce cross contamination. After completing the tests the students will put away their materials, clean up their work spaces, and finish their calculations. 25 minutes Transition: “Once you’ve finished with you calculations quickly rank the materials with your group, 1 being the material with the highest permeability, and four being the least permeable. And then return to your seats.” Students will make their determination as to which material has the greatest permeability and which had the least, and then they will return to their seats. 3. POST ACTIVITY Students will be asked to rank the materials from highest permeability to lowest permeability. Class will agree upon an order. Students will be asked to reflect on why each material has the permeability it does. Students will raise hand to venture suggestions. Class will be told about the rate of flow and how grain size and shape affect how easily water can flow through different materials. Students will be asked to relate this to each material. 2 minutes 10 minutes Closure: “So today we looked at how water flows through different materials. I want you to keep this in mind and start thinking about how this relates to aquifers and why we have aquifers in certain places and not in others. On Friday we’ll do a similar lab to determine porosity of the materials.” DAY TWO Objective: Given clay, soil, gravel, and sand, the 7th grade students will determine the porosity of each material. 1. PREACTIVITY: ADVANCE ORGANIZER The teacher will ask the students to volunteer what they learned last class in the porosity lab. The students will tell the teacher what materials had high permeability and which materials had low permeability. The teacher will ask the students how permeability contributes to a good aquifer. Students will eventually say water needs to flow through some materials and be stopped by others. The teacher will illustrate with a clear plastic cup, there must be something holding the water in place and preventing it from flowing out. The teacher will then point out the space inside the cup and ask students if it is empty. In order to contain water there must be empty spaces that can hold water. This is called porosity. Introduce lab. Transition: “So since aquifers are underground, there can’t simply be a wide open empty space there for the water to flow into, but there are spaces between the particles of each material. So today we’re going to measure how much water each of our materials can absorb and then use that to determine what materials and geological formations would make for a good aquifer. 2. ACTIVITY 10 minutes 5 minutes Students will divide into the same groups of three as they were Wednesday. Each group will designate one person to gather the materials, one person to pour the water, and one person to record the data. Each group will receive four plastic cups, one beaker, and one stop watch. There will be four buckets at the back of the room with four different materials in them, one with soil, one with clay, one with rocks, and one with sand. Each bucket will have a scoop or cup, and a 100 mL beaker for measuring the appropriate amount of material into each cup. Students will be given a lab sheet upon which to record their data. Each group will gather the appropriate amount of each material, 75 mL of each into the appropriate cups. As well as gathering 100 mL of water into a beaker. They will take them back to their table. The students will then carefully and slowly pour the water into the cup of sand, until there is a thin layer of water at the top. The students will then record the remaining amount of water in the beaker. The students will then subtract the remaining volume of water from the initial 100 mL, determining how much water was absorbed by the material. Students will dump the water used each time and use fresh water for each experiment so as to reduce cross contamination. After completing the tests the students will put away their materials, clean up their work spaces, and finish their calculations. Transition: “Once you’ve finished with you calculations quickly rank the materials with your group, 1 being the material with the highest porosity, and four having the lowest porosity. And then return to your seats.” Students will make their determination as to which material has the greatest porosity and which had the least, and then they will return to their seats. 3. POST ACTIVITY Students will be asked to rank the materials from highest porosity to lowest porosity. Class will agree upon an order. Students will be asked to reflect on why each material has the porosity it does. Students will raise hand to venture suggestions. Class will be told about how grain size and shape affect how easily water can be absorbed by each of the different materials. Students will be asked to relate this to each material. Closure: “So between our first lab and second lab we’ve covered the concepts of how well water can flow through materials and how much water can be absorbed by these materials. Both of these concepts are related to the size and shape of each individual particle and how much space there is between them. I want you to think about how these relate to creating an ideal place for water to collect underground. When we come back next week each group will have to make an aquifer in some form, either a 25 minutes 2 minutes 5 minutes 3 minutes drawing, a computer rendering, a model, or whatever else you can think of. So start thinking of ideas and be prepared to explain why it would make an effective aquifer. DAY THREE Objective: 1. PREACTIVITY: ADVANCE ORGANIZER Transition: 2. ACTIVITY Transition: 3. POST ACTIVITY Closure: DAY FOUR Objective: 1. PREACTIVITY: ADVANCE ORGANIZER Transition: 2. ACTIVITY Transition: 3. POST ACTIVITY Closure: DAY FIVE Objective: 1. PREACTIVITY: ADVANCE ORGANIZER Transition: 2. ACTIVITY Transition: 3. POST ACTIVITY Closure: DAY SIX Objective: 1. PREACTIVITY: ADVANCE ORGANIZER Transition: 2. ACTIVITY Transition: 3. POST ACTIVITY Closure: SUMMATIVE ASSESSMENT [Name of Assessment Tool & Description, including Authentic or Traditional]: POST TEACHING REFLECTIONS: