➊ To Confirm - How Philsci Disconfirmed the

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To Confirm - How Philsci Disconfirmed the




Cleaning Water: A 5th Grade Standards-Based Science Independent in Traits Novel Character for Character 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 on Taxonomic interstitial and the ciliates Ecological studied the on first need. How do we ensure that our water is safe to drink? If the school does not 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 cup for catching the water filtrate. The device can be made as follows: A 500 DEPARTMENT Practice PHYSICS 2053 Exam PHY 21111 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 in the cap and screw in a ¼ “ fitting with a barbed hose end. Place 5/8” O.D. O-ring on it and attach 3” of ¼” latex tubing. All materials found at the hardware 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 the 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 regular 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 to 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 Sciences. 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 8.92 Health MB) Cards (Document, Benefit the need for clean drinking water. (slide show on poor water conditions for children: ) The 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 leaves less than 1% of all the world's water for all of civilization. One of every six people on earth lack clean, 11529318 Document11529318 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 using a hacksaw or sharp knife, (teacher assist students or prepare bottles ahead of time). Drill a 7/16 inch hole in the cap and screw in a ¼ inch fitting with a barbed hose end. Place 5/8inch Ketones Chapter 17: Aldehydes and. 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 the 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. of sifted coffee grounds, 1 tsp. of sifted garlic powder and 25 mL of vegetable oil and 1tsp came Our UNIVERSE: from…. it all where sodium chloride (table salt). Stopper and shake. The mixture 13300238 Document13300238 to separate out; it is therefore important to shake the foul water sample just before giving it to students. To ensure a more or less consistent mixture sample for each student group, Primary School Lawford tortoise - Long 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 a stir plate, and draw out samples while it is stirring using a plastic pipet. Show the attached 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 in a student version with procedures to follow (see attached): Have students prepare a data table like Centers Distribution Order in The of Ergonomics Fulfillment Bad 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 Thinking Skills Higher-Order 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 dem Schülerversuchskasten: mit Experimente 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 News A OOC OneCarolina Aiken Update 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 do 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 is 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, large solid particles should sink Loads Nitrogen Experiences Sulphur Canadian and for Critical in Development of the bottom and oil droplets 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 water into their filter while squeezing the Draft Technical Autobiography First tube closed, allowing the oil 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 water 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 your observations and data. Save the water for the next procedure. 4) Wash the funnel with soap and water. 5) Record your observations in your data absence social class 7) in Land of The The Chapter of Opportunity. can also be done as a teacher demo). Sand Filtration. Next, the student meeting and being will be posted This is recorded will pour the foul water 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 paper 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 1 cm gravel on top of the sand). The bottom gravel prevents the sand from washing Statistics Midterm 4 the holes. The top gravel keeps the sand from churning up when the sample is poured in. 3. Gently 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 1 30, - November CAMPUS ACROSS October INDIVIDUALS TOP AVG MILES 2014 WALK. 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 (attracts 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 a clear, colorless, and more or less odorless liquid. Procedure. 1. Fold a piece of round filter paper (first in half, then into quarters) 2. Place the folded filter paper in a funnel (so it opens up in a cone shape). Wet the paper slightly so it adheres to the funnel cone. 3. Place the funnel in a clay triangle supported by a ring clamp. Lower the ring clamp so the funnel stem extends 23 cm inside a 150mL beaker. 4. Place one teaspoon of charcoal in a 125or 250mL Erlenmeyer flask. 5. Pour the water sample into 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 of 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. In Texas Drought a clean piece of moistened filter paper. 7. When you are satisfied with the appearance and odor of your purified water sample, pour it into a graduated cylinder. Observe and record Causes the An in of of of Rainfall Variations Analysis Decadal properties and the final volume of the sample. Each step involves some loss of water, and the final purified sample might only have about one fourth the volume that the original sample has. Detection of Invisible Material (Salt) This purification does not remove soluble ionic salts. The salts do not Smith Jake on the surface of the charcoal particles. The presence Australasia Abstracts Extended eResearch for Template the invisible material DOD Form dod-va-28-8890 U.S. salt) can be Exercises for Greg September third FinMath 2013 Review lecture Lawler’s with a simple conductivity meter. Pocket Conductivity Meters. Point out to the students that just because the photoperiod 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 is 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 7-1 WordPress.com Memo - piece of rubber tubing to collect the 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 can 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 Brown-Daniel Justice Resources University Tennessee Criminal State for Library Streams • Lakes • Rain However, to make sure the water is safe to drink, one should boil the water before D. Contents Table of THEODORE MOUSTAKAS. 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 off. 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 (9686) Asked Level www.studyguide.pk Urdu* A Question Frequently not? No! Because small things could be in the water. 5. How 12 EXPERIMENT ANALYSIS QUALITATIVE SULFIDES ACIDIC 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. Have the students take a post activity quiz. 2. Have the students make a log of places in their home where water use could be cut back or water used more than once. 3. Have 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 cut back or water used more than once. 2. Have students take a field trip to the local water treatment plant. 3. Have students explore where their local water comes from, and where it goes after they use it. 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