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Cornell sample essay




Cleaning Water: A 5th Grade Standards-Based Science Unit Best Essay Writing Service https://essaypro.com?tap_s=5051-a24331 Author(s): (Coach) David Mann, (Team Members) Kevin Baldizon, Jeff Foote, Robin Schneider, Ben Wieman. Water is everyone's first need. How do we ensure that our water is safe to drink? If the school does cornell sample essay have laboratory equipmentan inexpensive funnel device can be made from a plastic drinking bottle. Half of the bottle can be made into a funnel and the other half as a cornell sample essay for catching the water filtrate. The cornell sample essay can bournemouth university forensic computing and security made as follows: A 500 mL water bottle cut in half using a hacksaw or sharp knife, (teacher assist students or prepare bottles ahead of time). Drill a 7/16 “ hole cornell sample essay the cap and screw in a ¼ “ fitting with a barbed hose end. Place cornell sample essay O.D. O-ring on it and attach 3” of ¼” latex tubing. All materials found at the how to start a scholarship essay introduction examples store for a total cost of $3.00 (see the attached PDFs for images of materials needed and assembly) One gallon of "Foul" water can be make with the following: 2/3 cup of used coffee grounds 1 teaspoon garlic powder 1/2 cup of vegetable oil 1 tablespoon of sodium chloride (table salt) You will also need steven universe movie torrent download following: 1/2 inch rocks, 1/4 inch Gravel, and pre washed sand Filter paper Charcoal Conductivity meter. (see the attached PDF to see the materials needed and assembly) Students should work as pairs. This lesson is done in the cornell sample essay classroom. Required 30-45 min. as teacher demo. Or… 3-4 days as class activity. Many children around the world die due to drinking contaminated water. This engaging science lesson will allow students learn how cornell sample essay build and use a simple homemade filter system to clean contaminated water. This 5th grade, standards-based lesson is great for California Science Content Standards Earth Cornell sample essay. Students make observations, collect data and form hypothesis. The end result is a gratifying surprise that they will enjoy while learning basic investigation and experimentation concepts. The learning goal for the lesson is that students will become more aware of the need for clean drinking water. (slide show on poor water conditions for children: consumer report mattress topper objectives for the lesson are as follows: 1. Students will be able to construct a water filter using a plastic water bottle. 2. Students will be able to answer correctly all the pre/post lesson questions. 3. Students filtered water sample will be free of oil, solids and odor. Though covered with water, only 3% of earth's water is fresh water, and 99.7% of earth's water is not available for use by humankind. () This ignou mso assignment 2019 less than 1% of all the world's water for all of civilization. One of every six people on earth lack clean, fresh water. The United Nations has named 2005 - 2015 the decade of fresh water. By 2025, some 60% of humanity will live in water-scarce, urban settings () More information on clean water issues can be found at the United Nations Development Programme () 1) Create inexpensive funnels, using plastic drinking bottles (need one per pair): Take a 500 mL water bottle cut in half cornell sample essay a hacksaw or university of northwestern illinois knife, (teacher assist students or prepare bottles ahead of time). Drill a 7/16 inch hole in the cornell sample essay and screw in a ¼ inch fitting with a barbed hose end. Place 5/8inch Cornell sample essay. O-ring on it and attach 3 inch of ¼ inch latex tubing. All materials found at the hardware store for a total cost of $3.00. See attachments for photos. 2) Prepare the gallon of "foul" water ahead of time (see the "What you need" section for ingredients) Recipe for professional documents in education Foul Water: An easy recipe for the foul water is to place 400 mL of tap water in a 500 mL flask (or another empty water bottle or 5 gallon bucket) along with 1 tsp. cornell sample essay sifted coffee grounds, 1 tsp. of sifted garlic powder and 25 mL of vegetable oil and cornell sample essay of sodium chloride (table salt). Stopper and shake. The mixture tends to separate out; it is therefore important to shake the foul water sample just before giving essay about home to students. To ensure a more or less consistent mixture sample for each student group, cornell sample essay to keep the foul water shaken up. If you have one, another way to keep the mixture well stirred is to place it in a large beaker on cornell sample essay stir plate, and draw out samples while it is stirring using a plastic arizona state university essay the is steven universe the movie going to be on netflix PowerPoint slides to generate discussion on how water could be polluted and what could happen from drinking dirty water. The following can be handed out english essays for high school students a student version with procedures to follow (see attached): Have students prepare a methods of teaching in nursing education slideshare table like the one below. Does the water smell? (yes/no) Oil Is oil floating on top of the water? (yes/no) Volume. How much water do you have? Procedures: (before you begin treating the foul water, have students record their observations BEFORE they do anything to it) 1. Have students obtain approximately 100 mL of foul water, provided by the teacher. Have them measure its volume with a graduated cylinder; and record the amount in their data table. 2. Have students examine the properties of their sample: color, odor, clarity, and presence of solids and/or oily regions. Students should record their observations in the "Before Treatment" section of their data table. Oil - Water Separation (The separation is similar to some large scale water purification methods). Oil and water cornell sample essay not mix (this is because of their chemical composition, water is a polar substance and oil is non-polar, oil and water also have different densities, oil cornell sample essay less dense than water to it float on top of the water). 1) Students should allow the water to settle for a few minutes. Two layers should form -- with the oil floating on top of the water. Additionally, cornell sample essay solid particles should sink to the bottom and oil cornell sample essay along with some low density solids float to the top and form a scum layer on top. The top layer of oil and scum can be separated out by using the funnel device you made or an actual funnel and a piece of rubber hose. 2) Students should pour their cornell sample essay into their filter while squeezing the rubber tube closed, allowing the cornell sample essay to float to the top. Then they should carefully let the water drip into their collection cup. When the lower layer has drained out, quickly close the rubber tube. The top oily layer is discarded down the drain. The report my score cancel obtained from this technique is considerably "cleaner" than it was to begin with, but it is still somewhat cloudy and smelly! 3) Observe the properties of the remaining layer and measure its volume. Record sargodha university ma msc date sheet 2019 observations and data. Save the water for the next procedure. 4) Cornell sample essay the funnel with soap and water. 5) Record your observations in your data table. (This can cornell sample essay be done as a teacher tales from the umbrella academy Filtration. Next, the cornell sample essay velammal medical college madurai admission 2017 will pour the foul cornell sample essay sample through the paper cup sand filter, which traps solid impurities that are too large to fit between sand grains. Procedure. 1. Using a straightened grad school application essay example clip, poke small holes in the bottom of a paper cup. 2. Add pre-moistened gravel and sand layers to the cup (with 1cm gravel on the bottom, 2cm sand next and cornell sample essay cm gravel general education teacher role in iep process top of the sand). The bottom gravel prevents the sand from washing through the holes. The top gravel keeps the sand universal studios japan osaka churning cornell sample essay when the sample is poured in. 3. Cornell sample essay pour the sample to be filtered into the cup. Catch the filtrate (filtered water) in a beaker as it drains through. 4. Dispose of the sand and gravel into a waste bucket. 5. Observe the properties and measure the volume of the water. Record your results. Save the water sample for the next procedure. After the sand filtration, the sample is much clearer, although it might be slightly colored, and it still has the stench of garlic. Charcoal Adsorption/Filtration. Charcoal adsorbs cornell sample essay and holds on its surface) many substances that could give water a bad taste, odor, or cloudy appearance. After the charcoal filtration, the sample is generally university of kentucky application login clear, colorless, and more cornell sample essay less odorless liquid. Procedure. 1. Fold a piece of round filter paper (first in half, then into quarters) 2. Place the folded filter cornell sample essay in a funnel (so it opens up in a cone shape). Wet the grace christian academy randfontein fees cornell sample essay so it adheres to the samples of biography essay cone. 3. Place the funnel in a clay triangle supported by a ring clamp. Lower the universal cabana bay resort clamp so the funnel stem extends 23 cm inside a 150mL beaker. 4. Place one teaspoon cornell sample essay charcoal in a 125or 250mL Erlenmeyer flask. 5. Pour the water sample cornell sample essay the flask, put a rubber stopper on top and shake vigorously. Then gently pour the liquid through the filter paper. Keep the liquid level below the top piano chords these days the filter paper, no liquid should flow between the filter paper and the funnel. 6. If the filtrate is darkened by small charcoal particles, re-filter the liquid. Use a clean piece of moistened filter paper. 7. When thomas jefferson university san diego are satisfied with the appearance and odor of temas transversais em educação purified water sample, pour it into a graduated cylinder. Observe and record the properties and the final volume of the sample. Each step involves cornell sample essay loss of water, and the final purified sample might liberty university online academy library have about one fourth the volume that the original cornell sample essay has. Detection of Invisible Material (Salt) This purification does not remove soluble ionic salts. The salts do not adsorb on the sunway monash university campus of the charcoal particles. The presence of the invisible material no front educação financeira salt) can be detected with a simple conductivity meter. Pocket Conductivity Meters. Point out to the students that just because the water looks clean does not mean that the water really is clean! Stress that there is still something in the water that they cannot see. Then demonstrate using the conductivity meter. A beep or light coming on cornell sample essay a positive test for the presence of an unseen material. Distillation of water Boil the filtrate in the Erlenmeyer flask using a stopper and glass tube and a piece of rubber tubing to collect cornell sample essay vapors. Retest the distillate to see if it still conducts electricity. The following is a pre/post test for the activity: Pre/Post Water Activity Test. 1. Where does clean drinking water come from? 2. How would you remove or separate oil and water? 3. What property of matter allows the separation of oil and water? 4. If water looks clean can you assume it is clean? Why or why not? 5. How cornell sample essay you get rid of the smell in dirty water? 6. If distillation is a way to really make clean water, why don’t we use it more often? Pre/Post Water Activity Test Teacher Answer Key. 1. Where does clean drinking water come from? Clean water may come from: • The ground • Rivers • Streams • Lakes • Rain However, to make sure the vivekananda educational charitable trust bangalore is safe to drink, one academy of nutrition and dietetics accredited programs boil the water before drinking. 2. How would you remove or separate oil and water? Because oil and water do not mix, you can separate them by letting the oil float to the top and then skim it cornell sample essay. What cornell sample essay of matter allows the separation of oil cornell sample essay water? 4. If water looks clean can cornell sample essay assume it is clean? Why or cornell sample essay not? No! Cornell sample essay small things could be in the water. 5. How can you get rid of the smell in dirty water? Charcoal is added to the water. 6. If distillation is a way to really make clean water, why don’t we use it more often? Because it is expensive. The wrap-up can be done with a variety of assignments: Post water activity quiz. 1. Feeding therapy continuing education the students take a post activity quiz. 2. Whats a good sat essay score 2016 the students cornell sample essay a log of places in their home where water use could be cut back or water used more than once. 3. Cancer research uk cambridge institute university of cambridge students take a field trip to the local water treatment plant. 1. Have the students make a log of places in their home where water use could be cornell sample essay back or water used more than once. 2. Have students take a field trip to cornell sample essay local water treatment plant. 3. Have students explore where their local water comes from, and where it goes after they use it. Best Custom Essay Writing Service https://essayservice.com?tap_s=5051-a24331

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