Summer Science Club Experiments
This has been the greatest fun I have ever had in the
summer. Parents have asked me to
continue the science program I have created for my kindergarten class. I called a few parents of this years’ class
and believe it or not, I ran into some others I have taught in past years and
mentioned it to them. All were thrilled, and our once a week group has started.
WEEK 1 Carbon Dioxide
Nothing is more exciting for kids than blowing things up, or
shooting liquid into the air so we did carbon dioxide experiments. We talked
about gas in the air that we need, which is oxygen, and how that is given off
by plants and how they in turn they use the carbon dioxide we exhale. Then I
said we are going to do experiments that create carbon dioxide that explodes.
1.
A.We
put vinegar and baking soda in a bowl to see what happens. Vinegar is an
acid and when combined with baking soda
it begins to fizzle almost like an explosion. In class we use it to “blow up”
the volcano’s we make when studying rocks and minerals. I also explained it
makes carbon dioxide.
B.
The second thing we did was to put vinegar in a water bottle (about ¼ the way
up) and about 2 teaspoons of baking soda in a balloon. Put the balloon over the
bottle top and the baking soda will drop into the vinegar and create the gas
(carbon dioxide) to blow up the balloon.
2. Our
next experiments were with dry ice. Dry
ice is carbon dioxide frozen.
A.
First I showed how movies make the foggy air by putting water on dry ice. Kids
love the foggy look but it sometimes frightens them when they watch a movie.
After they see how it is made the scary part doesn’t bother them
B. I put dish soap on the
dry ice to make a bubble factory which always excites them.
After that I showed
the reaction metal has when it touches dry ice—it sings, and different size
utensils make different sounds.
C.
For the culmination of our dry ice experiments we wanted to see if it would
blow up a balloon bigger than the vinegar and baking soda one. We did that two ways--1.one was putting dry
ice into a bottle and putting the balloon over it. It did blow the balloon up.
2. The next question was what would happen if I put the dry ice directly into the balloon. The carbon dioxide would release so much gas
until the balloon would get so big it would break with a loud pop—which was
exciting to watch.
3.
Our
next experiment was to use ½ cup hair peroxide (I used 40%) to 3 tablespoons
dry yeast and a drop of food coloring. The effect was very pretty—The concoction
blew up not into a gas but a soapy sculpture shape.
4. Our
most exciting experiment was diet coke and Mentos candy. I made a tube out of paper that fit right
over the top of the bottle to drop 4 Mentos in.
What a tall explosion! They thought this was the best experiment! It
went at least 4 feet up. We explained
the chemical reaction to produce the gas again but continued on to see if other
sodas react the same way—even diet coke by other companies (they don’t).
This first club day was so
exciting no one wanted to miss the next one, even my grandchildren
who gave up a day of camp to come to Gammy’s science day.
SCIENCE
CLUB WEEK 2 Polymers
Mess was so much fun the first week I
continued by making polymers. Thank goodness for being able to do all this
outside. We talked about atoms and
molecules and what a polymer was. I visually show this by having the children
hold hands and pretend we were molecules and have them move loosely around. I
explain that polymers are molecules that make a plastic material that has
movement.
1. Our first squishy experiment
was making a polymer with corn starch and water in a big plastic container so
they could step in it--I also used a plastic dish container from the dollar
store. I let the kids put their hands in the containers to mix the water and
starch together to form a slime which they thought was the greatest! Then I had
them take off shoes and socks and step in it. To their big surprise it got hard
and they could walk on it like a solid without the squishy feeling. Then they
played with it again with their fingers and it was slimy again. I explained how a polymer can get and be
hard and soft just like plastic.
2. In a paper cup each child
made crazy putty with 1 inch white glue, 3 tablespoons water, and 1 tablespoon
borax (found in the soap isle of the grocery store). I use a Popsicle stick to
mix. This mixture was more dense and
pliable than the corn starch. If you put more borax it can bounce.
3. For this crazy putty we used
¼ cup white glue to ¼ cup liquid starch and I added a little water to the
glue. This putty was even more stretchy,
more like the flubber the kids buy in the dollar store.
Before we ended we again discussed molecules
and how to make polymers and named some plastics they used. At the end of the
club I put all their putty in a plastic sandwich bag for them to take home.