Guideline Research Corner 2013

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GUIDELINE

D MIPITAN, 16 Maret 2013



EXPERIMENT 1 : Color Changing Milk

What we need:

Milk

Liquid soap

Liquid dyes

Plate

Cotton bud

How we do:

1. Pour milk to a plate

2. Add liquid dyes (prefer more than two

colours)

3. Dip a cotton bud into liquid soap

4. Dip the cotton bud into one of the colour

above the milk

5. See what’s happen next

Why that happens:

Basically soaps and fats have the opposite properties. Interaction between soap with the fat in the milk

causing milk fat 'run' to avoid catches of soap molecules.

EXPERIMENT 2 : volcano eruption What we need:

Water

Liquid dyes

Baking soda

Vinegar

Liquid soap Plastic plate

Plastic cup

Duct tape (lakban)

Aluminium foil

Spoon

How we do:

1. Place the plastic cup above the backside



of plastic plate, attach with duct tape

2. Cover it with aluminium foil, then make a hole as big as the plastic cups

3. Pour the water inside, add the vinegar and liquid soap, stir it, then add the baking soda for the

last


Why that happens:

The bubbles that are created are filled with carbon dioxide. The carbon dioxide is a gas that forms when

the vinegar (an acid) reacts with the baking soda (a base). For all you bakers out there, this is also

what makes cakes and quick breads (the no yeast kind) get all nice and fluffy.

EXPERIMENT 3 : egg inside a bottle What we need:

Egg

Empty glass bottle

Hot water / paper and lighter

How we do:

1. Fulfill the glass bottle with hot water,

wait for a minute, then empty the bottle

again or make a fire with the lighter then

light the paper inside the bottle

2. Place the egg at the mouth of the bottle


4. To get the egg back out the bottle, rub

some water with your finger around the

edge of the bottle opening (inside). Turn the bottle upside down and let the egg fall into the

opening of the bottle mouth. Notice it does not want to come out. Now place your mouth over

the mouth of the bottle while holding it upsidedown. Blow really hard. No really hard. And see what’s happen next.

Why that happens:

When we ignite the piece of paper it heats the molecules of air inside the bottle. This makes

the molecules expand and move away from each other. They go up and out of the bottle with the heat

from the fire. Once the fire is extinguished the air cools down, but the egg on top of the bottle prevents

new air from outside from entering the bottle. This means the air pressure outside is greater than

inside the bottle. As a result the greater air pressure outside pushes the egg down into the lower

pressure bottle.



EXPERIMENT 4 : fire water balloon

What we need:

Water

Balloons / plastic cups

Candle

Lighter

How we do:

1. Light the candle

2. Blow up the balloon, place it above the

candle


4. Blow up another balloon, add water

inside, place it above the candle


Why that happens:

When we directly heats the balloons/plastic cups filled with water, heat flows from the heat source

across the surface of the balloons and passed on to the water. However, instead of melting due to the

heat generated, the water becomes hot.

EXPERIMENT 5 : water drainage What we need:

Water

Liquid dyes

Plate

Empty glass bottle

Candle Lighters

How we do:

1. Place the candle in the middle of the

plate, light it

2. Colour the water with liquid dyes, pour

into the plate

3. Cover the candle with empty bottle




Why that happens:

To be able to light up, fire needs oxygen. When the candle covered with bottle, oxygen is available only

in the glass just as much. When oxygen in the cup was discharged, fire seeks oxygen drift outside the

vessel, thus sucking the water at the plate. When the water is sucked completely into the glass, oxygen

is no longer penetrate the water layer so that the fire was dead. EXPERIMENT 6 : floating egg

What we need:

Egg Salt

Water

Glass / plastic cups

Spoon

How we do:

1. Fulfill the glass with water

2. Put the egg inside the glass

3. Add salt gradually, stir it


Why that happens:Because when we add the salt, density (ratio of object weight to volume) of water increases. In other

words, the higher level of the water viscosity. As the density increases, the float force will be greater.

In other words the lesser density (egg) will be above the greater density (water).

Guideline Research Corner 2013

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