TO PROVE TRANSPIRATION!!!!

Let see what is transpiration???


Materials:
Polythene bag
A recently watered plant
Rubber bands

Instructions

Keep the plant in direct sunlight.

Then cover the plant with polythene bag and tie the end near the base of the stem with the help of rubber band.

Leave it there for 3 to 4 hours.

Observe: You will observe tiny droplets inside the polythene bag!

What is happening??

This happens because of transpiration! What is transpiration? The process of giving out extra water by plants in the form of water vapour is known as transpiration! The water is given out by leaves.

THE EFFECT OF HEATING ON METAL!!!

Let's study the effect of heating on metal.


Materials:
Candle
Matches
Fire tongs or tweezers
A lock with a tight fitting key

Instructions

Put the key into the lock. The keep fits in properly.
Now put the key over the burning candle. Hold the key with the help of fire tongs or tweezers.
Put the key for 5 minutes.
Now try to fit the key back into the lock. What happens? Does the key fits?

What is happening??

Burning metal causes expansion of the metal. So the key expands and cannot fit into the key hole!
To fit the key back in follow the steps below:-
Leave the key indoor to cool it to room temperature.
After cooling try to fit the key into the key hole again. Does the key fits?


On cooling, the metal contract and returns to it's normal size, thus, it fits!!!   

A MOTOR BOAT WITHOUT A MOTOR!!!

Let's make a boat which uses energy to move!!


Materials:
Plastic bottle with screw on cap
tissue paper
1 drinking straw
Scissors
Clay
1/2 cup vinegar
3 tablespoon baking soda

Instructions

Make a hole at the bottom of the bottle. Enough to put an straw through.
After making the hole put the straw in and seal the area around the straw with clay.
Bend the straw downwards.
Now put 3 tablespoon baking soda on a piece of tissue paper and roll it. After rolling twist the ends.
Pour 1/2 cup vinegar into the bottle and quickly screw on the cap and set it on water.
The straw should be underwater. The BOAT MOVES!

What is happening??

The reaction caused by baking soda and vinegar creates a gas. This gas will try to escape. The gas will find only one opening- THE STRAW! 
So it escapes through it causing the boat to move forward!

HOT AND COLD!!!

Let us confuse our senses!!!!


Materials:
1 bowl filled with warm water
1 bowl filled with cold water
1 bowl filled with room temperature water

Instructions

Place the bowl with warm water to the left, the room temperature water in the middle and the cold water on the right on the table.


Put your left hand into warn water and your right hand in the cold water for 30seconds.


After 30seconds take your both hands out and place it at the room temperature water. You will feel that the hand placed in warm water will feel cold and the other hand placed in cold water will feel warm. This is because your hand gets use to the water they were placed in!!!

HOW TO MAKE A SUNDIAL???

Why buy a watch when you can recycle materials and make a watch which would use solar energy!!


Materials:
A sturdy paper plate
Unsharpened pencil
Modeling clay
Compass
Black marking pen

Instructions

Make a hole through the back of the plate enough to fit the pencil in.

Place the end of the pencil in a lump of clay to anchor it down.

Place the plate out in an open area. Locate north with the help of the compass and tilt the pencil a bit to north (If you live in northern hemisphere then you should point the pencil to north, but if you live in the southern hemisphere then tilt the pencil towards south.)

At 8:00am locate the shadow of the sun. Keep doing this after every hour till the day ends.

The next day exactly 8:00am the shadow will be on the markings and you will know the time!! 

  

LIQUID TOWER!!

Let's make tower of.......... LIQUID!!!

Materials:

Honey

Water

Oil

A very big jar

Instructions

Pour honey  into the jar using up 15% of the place.

Now pour the water into the jar also covering 15% of the place.

After pouring water pour oil on top of it.

Observe: The liquids float on each other. This is because of their densities. Honey is the heaviest, Water is lighter than honey and oil is the lightest!!

BIRD IN OR OUT OF THE CAGE?????

Let's see what is afterimage???


Materials:
3X5 Note card
Tape
Pencil
Scissors
Colored pens

Instructions

Cut the note card into half.


On one piece, draw a bird right in the middle of the card.


On the other price draw a cage in the middle of the card.


Tape the cards back to back on the end of a pencil so that you can only see one image at one side.


Rub the pencil very fast in your hand and you will be confused to tell if the bird was inside the cage or outside???

What Is Happening???

The effect is known as afterimage. This is a ability of our eye to see the images even after they are gone!! This is ability is know as afterimage!! When you spin the pencil you see the bird first than you rotate it very fast while you are seeing the bird the cage comes in focus and for this reason you think that the bird is in the cage!!!!!

PUTTING AN EGG INTO A BOTTLE IN WHICH THE EGG IS BIGGER THAN THE BOTTLE!!!

Let's make a egg go into a bottle where the cannot fit through the bottle and we don't even have to push it through!!!!!


Materials
1 small hard boiled egg
Baby's milk bottle
Small piece of paper folded like an accordion
Cooking oil
Matches

Instructions

Peel the egg and rub some cooking oil on the bottle's rim.


Light the paper with matches and drop the paper into the bottle.


Now place the egg on the rim of the bottle and wait for 5 minutes and you will see that the egg goes down into the bottle.


To get the egg back put the bottle upside down push the egg aside and blow as hard as you can and put your and below the opening the egg will fall right into your hand!!!

HOW DOES THIS HAPPENS?????

This happens because of air pressure!!


CAUTION: Burning of paper should be done in ADULT SUPERVISION.

HOW TO RECYCLE A BOTTLE AND MAKE A TUMBLER!!

Let's recycle a broken glass bottle and make a .................TUMBLER!!!


Materials:
A broken glass bottle bottom part
Iron rod
Salad oil 
Burner

Instructions

Fill the broken bottom part of the bottle with salad oil.

Now heat the iron rod over the burner.

After heating of 5 minutes immediately dip it into the oil you will see that the above part of the container brakes off leaving a beautiful tumbler behind!!

WHAT DO MAGNETS ATTRACT????

Let's see what all do magnets attract!!


Materials:
Various objects (nails, plastic toys, iron filling and other objects made from different materials)
One powerful magnet

Instructions

Put the magnet over the objects does the objects stick (get attracted) to the magnet??

Observe: The magnet only stick objects that are made out of metals (iron)

WHAT HEATS UP FASTER : LAND OR WATER???

Do you know what heats up faster : land or water?? Well if you don't try this experiment out!!

Materials:
2 paper cups
Water
Sand 
2 thermometers

Instructions

Fill one cup with water and other with sand.

Place them in the refrigerator for 10 to 15 minutes.

Now place these two cups outside when it is very hot and put the thermometer in each cup but don't keep the cups in the shade!!

After 15 minutes you will see that the temperature is higher in the cup containing sand!! 

ICE STOPS THE WATER TO BOIL!!!

Let's see how to stop boiling water by a scientific way!!!


Materials:
Pot containing water
A stove
Many ice cubes

Instructions

Set the pot containing water on stove and turn the burner on high. When the water starts boiling add the ice cubes.


Observe: After you put the ice into the water it stops boiling. This is the Second Law Of Thermodynamics. This law means that the burner will first flow to the coldest object. So the burner makes the ice melt. While the ice is melting the water stops to boil. After the ice melts the water will start to boil again.


CAUTION: Boiling of water should be done in adult supervision.

BICEPS AND TRICEPS!

Let's make a small but very educational  model of biceps and triceps (Biceps- Muscles on the upside of your arm
Triceps- Muscles below the arm)


Materials:
Two ice cream sticks
Two rubber bands (blue and red)
Thumbtack
Tape

Instructions

Place the ends of the ice cream sticks together and pierce through a thumbtack at the joints of the ice cream sticks.

Cut the rubber bands to form a strip of rubber band.

Now stick the blue tape at the outer edge of the ice cream sticks using the tape.

Now after you stick the outer edge repeat the same step in the inner edge. Now move the arms up and down.

The model just works like your arm!! The rubber bands are the muscles and ice cream sticks are your bones!!

REACTION BETWEEN MENTOS AND COKE!!

Let’s see what happens when we mix Mentos and coke?!?!

Materials:

Glass

Paper

Coke

Mentos

Tape

Instructions

Make a tube by rolling the paper. Secure the tube with tape.

Now open the bottle containing coke.

Put the tube on the open end of the bottle.

Now put some mentos into the tube.

As soon as you put the mentos through the tube and move away from the bottle.

The coke explodes like a mini volcano!!