`States of Matter: Solids, Liquids and GasesEugenia L. Sampson             Horace Mann School                               8050 S. Chappel                               Chicago IL 60617                               (312) 535-6640Objectives:This mini-teach lesson is designed for students at the primary level K-3.     1. Students will be able to recognize the properties of each state        of matter.                                                          2. Students will be able to recognize the similarities/differences        between the three states of matter.                                 3. Students will be able to recognize the presence of carbon dioxide         gas in soda.     Materials Needed:Activity 1: Groups of 4     1 small baby food jar     1 teaspoon table salt     carbonated soda, any flavorActivity 2: Groups of 4     1 mixing bowl     1 metal spoon     2 cups corn starch     1 cup water with a few drops of blue food coloringStrategies:Activity 1:     1. Fill the jar 1/2 full with the carbonated soda.     2. Add 1 teaspoon of salt to the soda.Activity 1:     Results: Bubbles form in the liquid then foam appears on top of the soda.       Why?  Each bubble seen in the soda is a collection of carbon dioxide gas.       Salt and carbon dioxide are both examples of matter and  matter takes up      space.  When the salt is added to the soda; it pushes the bubbles of carbon      dioxide out of the way.  These bubbles rise to the top bringing small      amounts of soda with them.  This movement of the gas forms the foam on top      of the liquid.  Replacing a gas with another substance is called      effervescence. Activity 2:     1. Mix ingredients in the bowl with the spoon until smooth.     2. The magic matter should look like a liquid.  Poke your finger        in it in several places.     3. Take a spoonful in your hand and roll it into a ball.     4. Place it on a table.  What does it do?     5. Pick it up again and roll it into a ball: Keep it in your hand.        What happens to it?       Activity 2:     Results:  When the ingredients are mixed together; the matter looks like a      liquid.  The matter rolls up into a solid, but when placed upon the table      it forms into a liquid again.  Why?  Starch is a solid.  Water is a liquid.     The water and starch are a suspension known as a colliod.  A colliod is a      material that consists of one substance suspended within one another.  The      suspended material is comprised of particles so small that they don't sink      to the bottom of the second substance.  Together, the two materials display      properties unlike those of their separate components.  Matter exists in      three states solids, liquids, and gases.  However there are many materials      that consist of one substance that doesn't conform to these neat      designations.  Such as fog, protoplasm, homogenized milk, synthetic rubber,      and mayonnaise which are all colliods. Activity 3:          Hold up your hand close to your mouth, and breathe through your mouth. The      warm air you feel on your hand is matter.  Touch the tip of your finger to      your tongue.  Your fingertip becomes wet from the saliva.  Saliva is      matter.  Touch your hair, a fingernail, your nose, and teeth.  These parts      of you are all forms of matter.  Matter is found in three forms in nature:      solids, liquids, and gases.                                   Performance Assessments:     Students will be asked to identify solids, liquids, and gases by selecting     samples of each and placing them under the correct category.Conclusion:     Everything you can see, touch, and feel is matter.  Matter is anything that      takes up space and has mass.  You are made of matter.  Matter can be dead      or it can be alive.  Definitions:     1. Solid - Any material or substance that is not a liquid or gas.  A        solid has a definite shape and volume.  A cube, sphere, or pyramid        are all solids, having length, width and depth.  They are not hollow.          2. Liquid - A state of matter.  Liquids flow and always take up the shape        of the vessel into which they are poured.          3. Gas - A state of matter that has a mass but no shape.  It fills and        takes the shape of a container.  Air is a mixture of gases.          4. Matter - The material of which all things in the universe are made.Reference:     Bouffard, Delores; Solids, Liquids and Gases: Milliken Publishing Company,     1984.    `