Author: Ronaldo Bunarli

Further yeast experiments

In this section, you will find yeast experiments that student groups can also conduct in the classroom independently of the Kniffelix missions. For each experiment, there is a website for students that explains the experiment in a target-group-appropriate manner, as well as accompanying material for educators. The tasks for the experiments are based on the school curricula.

Feel free to share your experiences with the experiments in the comments.

Group Experiments with Yeast
Searching for the optimal temperatureSubject: Math, Biology
Topic: ecological tolerance (recommended for lower secondary school)

To the experiment Accompanying material
It's gonna be hot!Subject: Biology
Topic: Enzymes, ecological tolerance, RGT rule (recommended for upper secondary school)

To the experiment Accompanying material
Subject: Biology
Topic: Enzymes, sugar metabolism in cells (recommended for upper secondary school)

To the experiment Accompanying material
That's sweet!Subject: Biology
Topic: Enzymes, Michaelis-Menten kinetics (recommended for upper secondary school)

To the experiment Accompanying material
These Yeast! materials were created in cooperation with the upper secondary ecology research profile of Goethe Schule Harburg under the direction of Olaf Zeiske. Here’s a look behind the scenes.

Help with experimenting

Felix gets a light bulb moment

Does your experimental result look different from the solution image?

Then you have been led astray. Various factors could have influenced your result. In the image gallery, you will find clues as to what might have influenced your experiment.

  • Einflussfaktor 1
    Einflussfaktor 1

Try the experiment again and consciously pay attention to these influencing factors.
The experiment still doesn’t work? Then write to us about your case.

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Help with experimenting

Felix geht ein Licht auf

Does your experimental result look different from the resolution image?

Then you were led astray. Various factors could have influenced your result. In the image gallery, you will find hints as to what might have influenced your experiment.

Try the experiment again and pay conscious attention to these influencing factors.

You still get a different result? Then write to us about your case.

Before you write a comment, take another look at the game rules.

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What does yeast stand for? (Mission 4 Order)

Salt, yeast and oil

Hello everyone!

Were you able to get to the bottom of the yeast?
What does it particularly like and what does it really dislike?
What experiments did you do?

Post your experiment pictures in the comments. If you did different experiments, you can exchange ideas about the results with each other.

Before you write a comment, take another look at the game rules.


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What did your investigations reveal? (Mission 2 Assignment)

Hello everyone!

Have you been experimenting diligently?

What did you find out and did the result surprise you?

Post pictures of your experimental results in the comments and compare them with each other.
Did you all get the same result or can you notice differences?

I’m looking forward to your pictures!

Before you write a comment, take another look at the game rules.


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Yeast at Work (Mission 2)

Dough prepared with yeast

Hello everyone!

So, not all dough is the same! Yeast makes the difference. What did your two doughs look like before and after resting?

Upload your pictures in the comments.

Can you notice any differences?
And if so, what could be the reasons for them?
Does anyone perhaps have the ultimate dough rising tip?

Before you write a comment, please take another look at the game rules.


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Small but mighty! (Guessing question)

Yeast cell under the microscope

Hello everyone!

As we now know, yeasts are very small fungi consisting of only a single cell. We humans, on the other hand, have a whopping lot – about 100 trillion cells.

A yeast cell is so tiny that it cannot be seen with the naked eye.

But how tiny is tiny?
What do you estimate?
How big is a yeast cell?
And how many yeast cells are in a 42-gram cube of fresh yeast?

Write your guesses in the comments. I will reveal the solution soon.

Before you write a comment, please take another look at the rules of the game.

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What kind of pizza are you?

Pizza auf Holzbrett

Hello everyone,

Do you love pizza as much as I do? I love eating Hawaiian pizza – of course, only with really fluffy, soft dough! How about you? What kind of pizza person are you?

Are you more for thick or thin, soft or firm dough?
Do you prefer to order pizza Italian or American style?
What kind of pizza is your favorite? Margherita, Hawaiian, or Salami?

Is there an ingredient that you absolutely cannot stand on a pizza?

Do you perhaps have a good pizza recipe that I could try?

Write to me in the comments. I’m excited to read your answers.

Before you write a comment, please take another look at the game rules.


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