Biology Experiments for Children: Unity is Strength

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(Edited)

Hello friends of @educationhive and @edu-veneszuela and all the parents and educators of the Education community here I present a series of experiments for children.

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We know that the approach to the contents of Natural Sciences for children is very fundamental; so that in this way children nurture the sense of exploration and expand their thinking.

We must promote the emergence of children's scientific thinking, so that in this way it finds its own answers.

With this experiment we want to show that yeasts are living beings because they breathe.


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Yeast is a material often used in the kitchen. It is used in order to "lift the dough", that is to say that it increases its size, but do we ever wonder how this happens or why?

The answer is based on these tiny organisms that belong to the kingdom of fungi (kingdom Fungi), that are unicellular (made up of a single cell), and that breathe: yeasts.

Materials for the experiments:

  • Warm water

  • sugar (1 teaspoon)

  • 2 balloons

  • fresh yeast.

  • 2 glass bottles.

  • Rods.


Process:

  • Mark each bottle with a letter (A; B) or a number (1, 2).
  • Put water up to half in each bottle.
  • In bottle A, add a teaspoon of sugar and shake.
  • In each bottle place a few pieces of yeast and shake gently with a rod until a homogeneous suspension is formed.
  • Close the mouth of each tube with a deflated balloon and place it near a heater. Look at the balloons after 30 minutes.

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With this experiment you can be shown that respiration is a process that involves the consumption of oxygen and the release of carbon dioxide for energy, if an organic substance such as glucose, normal sugar, or another carbohydrate is present. For this reason, it is observed that the balloon inflates only in the tube that contains sugar.

The production of carbon dioxide by a yeast is practically imperceptible, as it may be a grain of sand to the eyes of a person, but in a few grains of yeast there are thousands and thousands of microorganisms that breathe, and therefore enough is formed amount of carbon dioxide to fill (not much) a balloon.

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3 comments
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Buena publicación y gracias por compartir este experimento. Estaré esperando las próximas y bienvenido a la comunidad STEMGeeks.

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