MIXING WATER AND OIL!

Have you ever tried cleaning oil with water? Does it cleans the oil?No, it doesn't as oil is lighter than water. So try this experiment out to figure out how to clean oil with water!!


Materials:
A glass
Oil
Water
Detergent

Instructions

Pour about half cup water, and about half cup oil into the glass.

Now add detergent to the mixture.What happens?

Observe: You will observe that before adding detergent the oil floats on water as oil is lighter than water.When you add detergent into the mixture the oil mixes with water!!

Did you know? 

Water is known as universal solvent as it can dissolve anything added to it. If you add oil to water it will dissolve the oil in a century  or two!!!

HOW TO SEPARATE SALT AND PEPPER!!!

In this experiment you will learn how to separate salt and peper!!


Materials:


Salt


Pepper


Plastic spoon


Woolen cloth (example:sweater)socks will work well.

Instructions

Mix salt and pepper together.


Rub the plastic spoon on the woolen cloth for 2-3 minutes.


Now quickly put the spoon above the mixture, don't touch the mixture.


Observe: The pepper sticks to the spoon!!

What is happening??

When you rub the plastic spoon with the woolen cloth you static electrify the plastic spoon. Static electricity is the force which attracts the pepper to it!! 

EXPERIMENT TO SHOW HOW A HOT AIR BALLOON WORKS?

In this experiment you see how  hot air balloons work!!

Materials:

1plastic dry cleaning bag

Hair dryer

                        

Instructions

Open the bag and fill with air by pulling it quickly through the air around you.

Close the bag put leave a small opening in it, so that you can fit a hair dryer.

Heat the air inside the bag with the help of hair dryer for at least 10-15 minutes.

Observe: The bag rises

What is happening?

As air is warmed, the molecules spread out. This makes the  
Air lighter and hence it rises.

 As the air in the bag is warmed it expands and rises.

 
The rising warm air fills the bag and causes it to rise.

 This is how a hot air balloon works!

HOW TO MAKE A HOVERCRAFT!!!

In this experiment you will make a hovercraft!!

Materials:

1 CD

Thumbtack

Cardboard

Balloon

Plastic PVC pipe

Super glue

Instructions

Put some super glue on the CD.

Paste cardboard on the CD.

Repeat the above steps on the other side.

Now turn the CD to its original position and attach the PVC pipe 

onto the middle of the CD.

Make a hole at the opposite side of the CD using a thumbtack.

Now blow up the balloon as  much as you can and attach it to the pipe (make sure you do not let the air escape from the balloon)

Now put it on a smooth surface and lift the balloon a bit up so that the air can escape from the lower hole.

And you will see that........ The hovercraft is moving!!!

TEST FOR THE PRESENCE OF STARCH!!

In this experiment you will test for starch in the food item!

Materials:

Potato

Iodine solution

Test tube

Water

Dropper

Instructions

Put iodine solution in the test tube and dilute it by adding water.

By using a dropper drop a few drops of iodine solution onto the 

potato.

Observe:  You will observe that the places of the potato you have dropped iodine solution turn black-blue colour indicating the 

presence of starch!

Try this experiment again on a different food item.

THE "CAP" DIVER!!

In this experiment you will make a pen cap diver!!

Materials:

Pen cap

Reused water (save water!!!)

1-2litre bottle

Instructions

Drop the cap into the bottle.

Now pour water into the bottle till the rim and screw on the cap.

Now press the bottle and you will notice that the cap sinks and when 

you release the bottle the cap automatically floats!!! 

HOW TO MAKE AN EGG FLOAT!!

In this experiment you will make an egg float!!

Materials:

Glass

Cold water

Egg

Salt

Spoon

Instructions

Pour the glass half way with cold water.

Take a raw egg with no damage, and drop it into the water.Watch it 

as it sinks.

Now add a few spoons of salt and keep on adding until the egg 

FLOATS!!

What is happening?

As the water becomes denser (heavier) when you add salt into it the egg becomes very light for the water and it floats!

HOW TO MAKE A PAPER CLIP FLOAT

In this experiment you will make a paper clip float!!

Materials:

Clean dry paper clip

Tissue paper

A bowl of water

Pencil with eraser

Instructions

Fill the bowl with water.

Drop the paper clip on the water you will observe that the paper clip sinks.

Tear the tissue paper into half and gently drop it on the surface of water.

Gently drop the paper clip onto the tissue paper the tissue paper should not drown.

Now carefully with the help of pencil’s eraser push the tissue paper 

under the water and............ THE PAPER CLIP IS FLOATING

What is happening?

When you put the paper clip on the tissue and remove the tissue the paper clip floats due to SURFACE TENSION. Surface tension is a property of the surface of a liquid that allows it to resist an external force

HOMEMADE TELEPHONE

In this experiment you will make a string telephone !

Materials:
2 paper cups
A long elastic string (the longer the better)
2 pins

Instructions

Make a hole at the bottom of the cup.

Now tie one end of the elastic thread to one glass and the other end to another glass.

And here your telephone is ready!

Now ask your friend to put the opening of the cup into his ear and you hold the other cup to your mouth and say a sentence, ask your friend whether he heard the sentence or not?

What happens?

When you speak from one glass sound vibrations are made. The sound vibrations travel through the string and the same sound vibrations are produced in the other cup! This is how your friend hears the sentence!!