EXPERIMENTS

PING PONG BALLS ON MOVE

YOU WILL NEED !!! 

• STRING 
• 2 PING PONG BALLS 
• TAPE 

Steps to be taken 

1. Out of the string, make 2-1 foot long pieces.

2. Using tape, attach one end of the string to of the balls.

3. Take the other end of the string and attach it to a table.

4. Repeat steps 2 and 3 with the second ball. When taping this string to the table, make sure that the balls will hang off the table two inches apart and at the same height.

5. Blow between the two balls.

How it happens?

Bernoulli's principle states that in areas where air moves rapidly, pressure is low. When you blow between the balls you are lowering the air pressure between the balls. Blowing between the balls drops the pressure so the higher air pressure of the surrounding air pushes the balls together. 

MAKE A STARCH SLIME 

YOU WILL NEED !!!!! 

• 1/4 CUP OF WATER 

• 1/4 CUP OF WIGHT CRAFT GLUE 

• 1/4 CUP OF LIQUID STARCH ( USED FOR CLOTHES )

• FOOD COLORING 

• MIXING BOWL

• MIXING SPOON 

Steps to be taken

1.    Pour all of the the glue into the mixing bowl.
2.    Pour all of the water to the mixing bowl with the glue.
3.    Stir the glue and water together.
4.    Add your food colour now - about 6 drops should do it.
5.    Now add the liquid starch and stir it in.
6.    It should be nice and b lobby by now. As you play with your slimy                        concoction, it will become more stretchy and easier to hold.
7.   Explore your slimy creation and store it in a zip bag when you are not using        it.

How does it happen?

The glue is a liquid polymer. This means that the tiny molecules in the glue are in strands like a chain. When you add the liquid starch, the strands of the polymer glue hold together, giving it its slimy feel. The starch acts as a cross-linker that links all the polymer strands together. 

EGG GRAFFITI 

YOU WILL NEED !

• Hard-boiled egg

• Crayon

• Cup of vinegar

• Jar

Steps to be taken

1.  Carefully draw or write on the egg with the crayon. Put the egg in the jar, cover it with the vinegar and let it stand for several hours. Then dump out the vinegar.

2.  Replace it with fresh vinegar, and allow the egg to stand in it for another hour or two. Then wash the egg and remove the wax crayon marks. The eggshell may be very fragile, but your drawing or writing remains!

How it happens?

The acid in the vinegar combines with the calcium carbonate of the shell and dissolve much of it hut not the part that you wrote on with the wax crayon. The wax protects that part of the shell from the vinegar so that the section on which your drawing is not dissolved. 

COLOR THE FLOWERS 

YOU WILL NEED : 

• Water

• Scissors

• Food Co louring

• Jar, Plastic Cup or Test Tube

• A Flower (light colored-white carnation) or Celery Stalk (with leaves)

THIS IS A COLOR CHANGING EXPERIMENT

STEPS TO BE TAKEN :

1 Fill the cup with water.

2 Add a few drops of food colouring

3 Cut the end off the stem (stalk)

4 Put the flower in the water

How it happens

Watch and in time the food coloring will be sucked up the stem along tiny tubes (called vessels) and the petals of the flower will start to change in color. Another way to try this experiment is to get a flower with a long, thick stem (or a celery stalk with leaves) and slit it carefully from the bottom and put one end in separate test tubes (with different food coloring's).  Your flower (or celery) should have petals (or leaves) in two different colors. Did you know that plants need water to live?  As well as absorbing water from the atmosphere (air) through their leaves, they suck water up through their stems.  If you used the celery stalk for the above experiment you could cut the stalk and see that the little holes inside are colored. 

HOW TO MAKE A LIGHT BEND ( BENDING LIGHT ) .

Steps to be taken

1.    Do this experiment in a dark room to achieve much better results.
2.    Cut a narrow slit at one end of the shoe box using sharp scissors.
3.    Fill the jar with water.
4.    Place the flat-sided jar of water in the shoe box.  Position the jar at an angle near the slit.
5.    Place the flashlight/torch up against the slit so that the beam of light goes straight through to the jar of water.

How it happens?

Light moves slower through water than it moves through air.  When the light goes through the water, it slows down and bends.  As the light re-enters the air, the beam of light speeds up again and bends back.  This is called refraction.