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What is in Tap Water? (page 2)

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Author: Michael Calhoun

Materials:

What materials are required?

Package of 8 oz plastic drinking cups, distilled water, bottle water, jars, Latex or rubber gloves, and a sample of water taken from a local stream, pond, lake, or river.

Where can the materials be found?

All of the items for this project are available locally at most major retail (Wal-Mart, Target, Dollar general, etc) discount department stores also, a Tri-fold cardboard display board can be purchased from an art & crafts supply store.

Experimental Procedure:

  1. On a rainy day collect a jar full of rainwater. Place the jar in a cool place until the day of the investigation.
  2. Using a jar fill it with water collected from a nearby stream, pond, river, or lake.
  3. Set up five clear plastic cups or drinking glasses.
  4. Fill the first cup half full of the water gathered from the field.
  5. Fill the 2nd cup half full of distilled water.
  6. Fill the 3rd cup half full of cold tap water.
  7. Repeat the same procedure using bottle water, and the rainwater.
  8. Place the glasses in a warm place preferable in sunlight. After a time, bubbles will be seen collecting on the sides of the glass this is gases which were dissolved in the water.
  9. Record how long the bubbling last for each sample in a table similar to the one shown below. 
 Water Source           Total Gas (bubbling) Release Time
 Stream/pond water   
 Distilled water       
 Tap water   
 Bottle water         
 Rainwater  
  1. On a sheet of graph paper visually display the data in the table by plotting a bar graph of Gas Release Time verse water sample.
  2. The amount of time it takes for the bubbling to stop is displayed along the vertical axis and the water source samples are displayed along the horizontal axis.

Terms/Concepts: Tap water; white water; gas solubility; solvent; distilled water; experimental control

References:

References to related books

Title: Water

Author: Alice Flanagan

Publisher: Coughlan Publishing ISBN-13: 9780756509774 and ISBN: 0756509777

This book about water is written for elementary school age children. The author describes a myriad of water topics including; its cycle, uses, altering states and types, where it is found and how modern technology channels clean water. The book contains interesting water facts, a glossary, and an index along with a resource page. The young investigator will find this book useful to consult for background material for this science fair project.

Title: Water Science Fair Projects, Revised and Expanded Using the Scientific Method

Authors: Madeline P. Goodstein and Tom LaBaff & Stephanie LaBaff (Illustrators)

Publisher: Enslow Publishers, Inc. ISBN-13: 9780766034112 and ISBN: 0766034119

This book offers twenty-four experiments that can be used in conjunction with a science fair project. Starting with a brief introduction about the importance of water, the author leads the reader through a detailed description of the scientific method, how to design an experiment, record data, and tips on how to be produce a successful project. The various chapters in the book cover such topics as the structure of water and provide experiments on molecular structure and solubility. Other chapters address the three states of matter and examines why ice cubes float, how changing from solid to liquid requires heat energy, and the process of distillation. The book contains a glossary and research pages.

Links to related sites on the web

Title: Water

URL: http://chestofbooks.com/food/household/The-Profession-Of-Home-Making/Water.html

Title: Solubility of Gases

URL: http://www.espere.net/Unitedkingdom/water/uk_watexpsol.html

Title:How Water Forms

URL: http://hydrateyourself.net/HowWaterForms.php

Title: Why does my tap water look cloudy this winter?

URL: http://www.mwra.state.ma.us/04water/2004/whitewater.htm Title: The water we drink URL: http://dardel.info/EauAnglais.html

Title: The water we drink

URL: http://dardel.info/EauAnglais.html 

NOTE: The Internet is dynamic; websites cited are subject to change without warning or notice!

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