LIQUIDS IN SUSPENSION EXPERIMENTS

LIQUIDS IN SUSPENSION—LAVA LAMP

This week we started by my asking if anyone knew what I meant by liquids in suspension.  Anaka who is in 4^th grade explained it was liquids in a bottle that didn’t mix like oil and water. She was right and we were going to prove it as we did our experiments.

1.      We started our by making a lava lamp.  We used any bottles we could find.  Some kids brought glass jars and others used water or soda bottles. All bottles or jars needed lids. Each child  filled the bottle with ¼  water and then filled it to over ¾ with oil.  Add a few drops of food coloring.  Do not mix the colors as they will blend together.  The first observation was that the food coloring dropped down to the water and did not mix with the oil.  If the bottle was shaken the food coloring would rise up with the oil like lava and then drop down.  We added ½ of an alka seltza pill to the bottle and all were excited about what happened.  It behaved just like a lava lamp that you buy in the store.  When the Alka Seltzer mixed with the water it dissolved and the food coloring and water drops  exploded up in the bottle. I asked why?  The kids had no idea. Alka Seltzer is just like baking soda and when it hits the water carbon dioxide gas forms pushing the water and food color up. The “lava” will stop after the Alka Seltzer dissolves but more can be dropped in.

             LIQUIDS IN SUSPENSION--PAINTING WITH MILK





      Our next project was to see what happens with whole milk, food coloring, and Dawn dish soap. We put enough milk to cover our tray. I used allergy needle trays, but any tray or saucer with sides will do. Next drop little drops of food coloring into the milk. The food coloring and the milk do not mix.  Take a Q-tip, dip it into the dish soap and put it into a drop of food coloring in the tray and watch it form patterns. This can be done over and over again to form new patterns. Now take a piece of paper, lay it on the designs in the tray and make it a print. Why didn’t the milk and food coloring mix?  The answer is that whole milk is a fat like oil and it stays in suspension until you add soap.

LIQUIDS IN SUSPENSION--OIL AND WATER

3.      Try the same experiment with oil, water, and  food coloring . T here is a famous painter who makes pictures out of this mix.Put only enough 

    oil to cover bottom of the tray.The colors will

     make a darker print.

4.      Just to try something else we added a small piece of Alka Seltzer to each tray and watched the carbon dioxide gas form bubbles and mix the colors.

Not only did the kids have fun doing these experiments but so did the parents who were here.  Many paper prints were made from the beautiful flowing patterns.

A special note—this can become very messy so cover all tables with plastic and newspapers to absorb the liquid. I had two of the kids get so into the project and the moving colors, they used their fingers to add soap to the colors. They were covered in messy soap paint.  Good thing it was soap so it washed out easily.

Science With Miss Gail

EXPERIMENTS ARE FUN SCIENCE

Miss Gail’s Fun With Science is a program to introduce children with the joys of exploring science and to show teachers how easy it will be for them to provide science in their class.  All experiments will use objects and materials found at home or in the groceries or dollar store.  I have used all these experiments in my kindergarten class and in science programs for the PTO and in science camp.  In my class I utilize science and experiments as a differentiated method of teaching.  After each experiment I will have a discussion with the class and ask what I did, what they saw, and what they learned. I will also ask them to draw a picture of what we did and I will have my aid and I help them write one fact about the experiment.  We write it on a paper for them and have them copy it onto their paper that has the experiment picture they drew.  This project put the child's thoughts on paper in sentence form, and shows that words and sentences have a certain form, and teaches beginning writing. After a few times of writing their facts you would be amazed at how proficient the children become in remembering facts, learn how to write and think in cohesive sentences and thoughts.  You would also be surprised at how much they enjoy doing these papers. Parents also are impressed about how their child retains these facts about the science experiments, and sometimes the child knows more about the project than the parent.

Experiment 1

Magnets-What will they pick up-Ask the class what they can find in the class that   a magnet will pick up.  Give each child a magnet and let them explore in the classroom.  Have a discussion about their findings and let each child show the class what they tried. 

Explain to the class that magnets only work with iron and steel and will not work with other metals-then prove it by trying to pick up other metals. Also try to pick up plastic, paper, glass, material, etc.

Give each child a paper plate, iron filings, and a magnet to have fun moving the filings.

Have a discussion about what they have learned. Depending on their age have the children draw a picture or if they 5 and older a fact and a picture. Each child should share their findings with others.

Experiment 2

Blowing up a balloon using vinegar and baking soda to make carbon dioxide gas.

1.     Blow up a balloon with your mouth.  Ask why the balloon gets bigger. Someone should guess air.

2.     Put a balloon on a soda bottle-ask why it just sits there.
Put vinegar in that same bottle and put the balloon back on—why does it still sit there?

3.     Take the balloon and put baking soda into the balloon and put it back onto the bottle.  Gas should form as the baking soda falls onto the vinegar.

4.     After the class quiets down (they will be so excited about the balloon blowing up they will be squealing with joy) ask what happened.  Explain that vinegar and baking soda form a gas, carbon dioxide that blows the balloon up just like the carbon dioxide that we blow from our mouth.  You could also go further and explain we breathe in the gas oxygen from the air and breathe out carbon dioxide.

Experiment 3

Static electricity using balloons-

Blow up a few balloons.  Rub your hair and watch the balloon stick to your head or clothes or the wall and watch hair stand up.  Try other things to rub—which work and which do not- Explain about static electricity. The kids will have so much fun trying everything they see in the class.

Experiment 4

Color bursts-

Put milk into a saucer or pie pan-add a few drops of dish soap then a few drops of food coloring-watch the color disperse into moving patterns. Explain that milk is a mixture of fat and water called emulsion.  When you add dishwashing liquid the fat and water start to mix together because the soap breaks up the fat.  When you add food color it moves while the fat is breaking up forming great patterns. For more excitement and fun I let each child take paper and blot it on top of the moving colors to create a picture.

Experiment 5

Slime- for each child put some water into a cup, add cornstarch until slime begins to form and then a drop of food coloring—The screams will come as it forms slime—they will want to play with it so make sure they have smocks and cover the class tables.  Have them take the slime in their hands and squeeze it. It will become a solid, when put back into the cup it becomes liquid again.  If the kids are old enough explain that what they have made is a polymer just like plastic.

Experiment 6

Magic bag-Fill a plastic sandwich bag with water, take a very sharp pencil and stab it through the bag—from one side to another.  The water will not leak.  It can be stabbed over and over with more pencils and not leak.  Be sure to stab straight.  When you pull out the pencil the water leaks out. What happened is that plastic is a polymer and forms tightly around the pencil so it won’t leak.  This can be messy so do it  over a bowl.

 

Experiment 7

1. Slime or magic bounce –Put about ¼ cup water, 2 tablespoons white glue, in a small paper cup and sprinkle borax (found in the laundry isle of the grocery) on top. Give each child a plastic spoon or popsicle stick to mix it all -depending on the amount of borax you can either have slime or a plastic like substance that can pull or form into a bounce ball.  You can also add color to the mixture.  The mixture has caused a polymer like plastic. The kids will squeal when you do this.