How come?

How to make a cloud in a  glass jar ?

Supplies:

                ►Large glass jar (one gallon size )

                ►Matches

                ►Rubber glove

                ►Rubber band

                ►Flashlight or a lamp

                ►Food coloring

                ►Water

How it work?

                   The air is full of warm water vapor molecules inside the jar. The air is compressed by the glove because the glove takes up some of the space inside the jar. Pulling the glove fingers out of the jar releases some space in the jar. The air inside the jar cools. The smoke from the match acts as a vehicle that the water molecules can attach to. They stick to the smoke particles, condensing into cloud droplets. When the glove fingers go back into the jar, the air inside the jar warms up again and the cloud disappears.

Step 1:      Pour boiling water into the jar.

               Cover to the bottom of the jar with water.

               Swirl the water around the jar.

               Use oven mitts if the jar is very hot.

Step 2:      Put the rubber glove wrist around the mouth of the jar.

               Having the fingers of the glove pointing downward into the jar will seal in the air into the jar.

Step 3:      Try to put you hand in the glove.

               With this you can make sure that noting happens to the water in the jar.

Step 4:      Light a match and drop it in the jar.

               Take off the glove from the jar for a moment.

               Light a match and drop it in to the jar.

               Stretch the glove back over the jar.

               The water at the bottom of the jar will put out the match, and smoke will from in te jar.

Step 5:      Light a match and drop it in the jar.

               Slide you hand into the glove and pull it outward agin.

               This time a cloud will form in the jar, and when you put you hand back inside the jar the cloud will disapper.

Step 6:      Have fun.

               If you use a flashlight on the jar you will be able to see the cloud better.

               If you add few drops of food coloring to the water in the botton of the jar, you can see the cloud bloom with differents colors.