Junior high school composition: I will do popular science around yogurt (3) fermentation.

Title: I will conduct scientific research around the fermentation of yogurt (3)

Keywords: junior high school should do fermentation.

This article is suitable for: the first grade of junior high school.

Composition source:

This composition is about Grade One. The topic is: "I will carry out popular science around yogurt (3) fermentation". Everyone is welcome to contribute enthusiastically.

Science around us (3) Fermentation

I'll make yogurt.

Yogurt tastes sour and sweet, and every child loves it (so do adults, hehe. ), but how is it made? Do you know that?/You know what? Do you know that?/You know what?

My mother made yogurt the other day and watched bags of pure milk turn into delicious yogurt. I want to do it once. I finally got a chance today, because my mother agreed to do it herself under her guidance. Haha, I'm so happy!

Making material

Step 1: Prepare raw materials.

In which: 4 bags of pure milk * * * 1000ml.

Lactic acid bacteria 1 bag (you can make 1 kg bagged strain yogurt, and mom says this is the key material for making yogurt! )

yogurt machine

Step 2: Preparation before production

First of all, clean the yogurt machine, and the stainless steel container inside should be scalded (preferably boiled) before use (children must not cook by themselves, which may burn themselves, and adults should do it. Because the container must not be polluted by dirty things, nor can it come into contact with oil. This is my mother's experience! )。 In addition, pure milk can't be frozen, so it must be kept at room temperature, otherwise it will definitely fail, but my mother told me!

Pour in milk

Pour into the flora

Step 3: make

First, pour pure milk into the container of yogurt machine, then add lactic acid bacteria, stir well, cover it, and plug in the power supply of yogurt machine. Mom said it would take about 10 hour to make delicious yogurt.

Fully stir

Step 4: modulation

The yogurt just made is not sweet, so some auxiliary materials need to be added, such as honey, juice and fruit. At this time, you can give full play to your imagination and make attractive and delicious yogurt yourself. See if I'm doing well? You can also make delicious and beautiful fruit salad! How's it going? Be greedy! Haha, do it quickly!

It worked, not bad!

Yogurt salad

Mom talks about popular science: yogurt is fermented from pure milk, and the function of yogurt machine is actually a constant temperature and low temperature heat source to provide the heat needed for milk fermentation. Fermentation is a special process in which microorganisms decompose organic matter, and it is a biochemical reaction. The rice wine and steamed bread that we often eat are all fermented by yeast, and the main contributor to their fermentation is a microorganism. Yogurt is fermented by lactic acid bacteria, steamed bread is fermented by yeast, and rice wine is fermented by koji. Pure milk is more easily absorbed by human body after fermentation, and lactic acid bacteria also produce a large number of nutrients necessary for human body during fermentation, which is especially easy for people with indigestion to eat and is beneficial to the absorption of calcium. It's a rare delicacy, and summer is coming, so friends, let's get started! Let's make a delicious yogurt dinner and see who cooks it well.

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The American poet Whitman wrote in a poem: When a child walks forward, what he sees becomes a part of his life. If a child meets an early lilac, lilac becomes one of his life; If you encounter messy weeds, weeds will become a part of your child's life ... As your child's parents, we have the responsibility and obligation to lead your child to lilacs! Because children have dreams, they can really fly.

Discover the science around us and know that science is around us.

I believe that under your careful guidance, children can not only learn scientific knowledge, but also satisfy their own hands-on desires. As parents, why not do it? Discovering and entering science depends not on preaching, but on doing it seriously, so as to lead children to plant the seeds of science and enter the sacred palace of science.

Postscript: To guide children to love and learn science, it is not just preaching, but the children must do it themselves to play their due role.