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Cultivate Bacteria Using Agar Made at Home
All around us, there are bacteria, yeast, and other such microorganisms. You can make culture medium at your home and then get your samples from various places to know what survives there.
Ingredients required: A small airtight container, gelatin dessert.
If you get gelatin from outside, then follow the instructions in the package to prepare it. If you do not get it from outside, you can make it at home.
Heat some water on the stove add all package contents into it, and keep on stirring the whole mixture vigorously till all the gelatin grains start dissolving. While the solution is hot, pour it into the container where you will cultivate your bacteria and put the lid on to avoid all kinds of contamination. You can store this container in the fridge overnight to allow the gelatin to solidify. Now remove it from the fridge, touch the gelatin, and again put on the lid leaving the container at room temperature or near to radiator for some days.
After some days, you will see there are some white colored spots on the gelatin and they are the bacteria present in your hand. We know that microorganisms are present everywhere but we can’t see them as they are very small and are dispersed. But when we use gelatin which contains so many nutrients, they divide several times and start accumulating in the container till we can see them.
Change Flower Colors
Ingredients you need: Flowers, a glass, water and ink.
This is one of the easiest experiments you can do. Keep the flowers in one glass that contains water and colored ink. After some time, you will observe that the petals of the flower will have colored petal ribs or veins, of similar color as the ink.
In normal cases, we offer water to the plants to keep them alive. Plants consist of a tube system that helps in the distribution of water and nutrients to various plant parts. By making use of coloured water we can see this tube system.
Make An Egg Ball
Ingredients required: Eggs, vinegar, pot with a lid.
Keep the egg along with the shell in a pot having vinegar and then cover it with a lid. Allow it to sit for a few days. You can see some flexible smelly eggs that you can use like a ball.
The single cell that is present in an egg is covered by an eggshell. The shell is made up of calcium carbonate that on reacting with the acetic acid present in the vinegar, causes decomposition. This results in the naked egg that has enhanced flexibility.
Cooking Egg Using No Heat
Ingredients required: Eggs, alcohol, bowl
Do you want to invent your cooking skills? The next time you wish to cook an egg, keep it in a bowl and then add some alcohol to it. After a few minutes, you can observe how it is cooking slowly.
Cooking an egg involves protein denaturation that is present in the cell covered by the eggshell. This denaturation is attained through heat exposure but the other way is the addition of compounds like alcohol that help in the denaturation of the proteins through interaction with them and changing the 3D structure.
See Osmosis With Potatoes
For this experiment, you need a potato, two bowls, salt, and water.
You can cut the potato into two halves. Keep one piece in one bowl having salt water and another piece of the potato in another bowl with plain water, After some hours you will see how the piece of potato present in the saltwater starts shriveling and the other one in the plain water remains firm.
Grow Bacteria At Home
Materials you require are Gelatin, cotton swabs, plastic containers, and water
Dissolve sugar and gelatin in water and pour it into a container so that it settles. Make use of cotton swabs for collecting samples from various surfaces and then streak on the gelatin surface. Cover it and see the bacterial growth in a few days.
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