SCIENCE FAIR PROJECT

SCIENCE FAIR PROJECT

MADE BY

• EFRAIN MASTRODOMENICO
• ALEJANDRO CALDERON
• SEBASTIAN LOPEZ
• JOSE LUCAS BLANCO
• DENNIS HERNANDEZ

GROWER OF BACTERIAS

Ice in 5 seconds

2016

Agenda concept that relates

 The following experiment allows smaller the importance of washing hands before eating to prevent diseases such as cholera and hepatitis.

Necessary materials

 The materials are very simple all you need is an envelope unflavored gelatin, bouillon cube and some flat containers with lids.

 Explanation of the experiment

1) Dissolve bouillon cube and envelope of gelatin in 1/2 liter of water. Let it boil for 10 minutes.

2) Sterilize jars and lids putting them in boiling water for 5 minutes.

3) Pour the mixture into each container and closed it . Leave to cool and solidify the gelatin.

4) Then get your hands dirty! No need to wipe the toilet bath or jugues with mud. I'm talking about dirtying "bacterially" for example, a micro subite Conta the back they gave you at the kiosk or Agarrate the stair railings. Things we do every day without thinking about the amount of bacteria and virus in those places. It is not to become paranoid, but to be careful.

5) Now that you have dirty hands touching with your fingertips and hardened gelatin. Cover lid tightly and leave in a warm place for 24 or 36 hours

 After that time, you'll see something like this:

[pic 1]

Each white dot is a colony of bacteria. You'd be surprised at the experiment but this time with clean hands thoroughly ( soap and water) again.

It allows us to draw conclusions

After the experiment we can see the culture of bacteria and be more careful with our personal hygiene.

materials

sodium acetate trihydrate (you can buy at any drugstore).

Distilled water.

Hotplate.

Process

To prepare the supersaturated solution dissolve the sodium acetate in water heated to about 100 ° C (up to a boil). The ratio we have used is 150 gr acetate in 50 ml of water.

Let cool the solution in the refrigerator for 2 hours at least. The solution prepared does not expire so that we can prepare and leave it longer in the refrigerator.

During boiling, it is likely that small particles have been deposited acetate in peredes the container, so it will be convenient to clean the vessel walls and transfer the solution to a clean glass before putting it in the fridge.

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