There are six stations marked 1-6. Follow the directions below with your
partners and record what occurs. As you are doing the task think about
what property of matter you may be investigating. We will discuss this
as a group to find out just why you are exploring.
Cornstarch and water. Mix about 3 ml in plastic cup. Slowly add
about 3-4 ml water...but be careful...mix as you go along until the
consistency is weird.
Baking soda and vinegar. Place 1 ml in plastic cup. First
drop 10 drops of vinegar. Observe what happens. Smell the gas that
is emitted. Drop another 10 drops. What happens. Can you
stir up the reaction?
Put in 5 ml of water in a plastic cup or tube. Put one drop of
Bromothymol blue. Mix with the dropper. Blow into the liquid with
a straw. What happens?
Put 3 ml of Plaster of Paris in cup. Slowly add drops of water and mix until
it is not wet, but not dry. What happens as it dries? You may want to hold
it for a few minutes.
Put in 5 ml of water in 3 different plastic cups. Put 1 drop of glycerin in
the cup, then in another cup put 3 drops, and then 5 drops. Which one makes
the best bubbles? Test with a straw by putting some of the liquid in the
straw and then blow into the straw.
Put about 1 ml of borax on a piece of wax paper. Then slowly mix about 7 ml
(about 1 teaspoon) of glue into the mixture. What happens?