Question

ДАБАИ ИССЛЕДУЕМ Представь, что ты работник научно-исследовательс- кой лаборатории хлебозавода. Тебе необходимо про- вести ряд экспериментов по улучшению качества хлеба. Добавь по одной чайной ложке сухих дрожжей в ста- канчики с холодной, теплой, холодной и подслащенной, теплой и подслащенной водой. Сделай предположение о том, в каких условиях дрожжи будут размножаться быстрее. Пронаблюдай за ростом дрожжей. Какие ре- зультаты ты получил?​

Answer 1

Если добавить в теплую подслащенную воду сухие пекарские дрожжи, то они начнут активно размножаться и разлагать сахар на спирт и углекислый газ, что называется брожением.

Answer 2

Experiment on Yeast Growth in Different Conditions

As a worker in a scientific research laboratory at a bread factory, you have been tasked with conducting a series of experiments to improve the quality of bread. Specifically, you need to investigate the conditions under which yeast will grow and multiply faster. You are instructed to add one teaspoon of dry yeast to separate containers filled with cold water, warm water, cold sweetened water, warm sweetened water, and plain warm water. Your goal is to observe and compare the growth of yeast in these different conditions.

Hypothesis

Based on prior knowledge, you can make an educated guess about which conditions might promote faster yeast growth. It is reasonable to assume that yeast will grow faster in warm water and even faster in warm sweetened water. Yeast is a living organism, and like most living organisms, it tends to thrive in optimal conditions, such as a warm and nutrient-rich environment.

Experimental Procedure

To conduct the experiment, follow these steps:

1. Prepare five separate containers, such as cups or beakers. 2. Add 100 milliliters of cold water to the first container. 3. Add 100 milliliters of warm water to the second container. 4. Add 100 milliliters of cold sweetened water to the third container. 5. Add 100 milliliters of warm sweetened water to the fourth container. 6. Add 100 milliliters of plain warm water to the fifth container. 7. Add one teaspoon of dry yeast to each container, stirring gently to ensure the yeast is evenly distributed. 8. Observe and record the initial appearance of the yeast in each container. 9. Place the containers in a controlled environment, such as an incubator or a warm room. 10. Monitor the containers periodically, noting any changes in the appearance of the yeast and its growth over time. 11. Record your observations at regular intervals, such as every hour or every few hours. 12. Compare the growth of yeast in each container and draw conclusions based on your observations.

Expected Results

Based on the hypothesis, it is expected that the yeast will grow faster in the warm water and even faster in the warm sweetened water. The yeast in the cold water and cold sweetened water may grow more slowly, while the yeast in the plain warm water may show moderate growth.

Conclusion

After conducting the experiment and observing the growth of yeast in different conditions, you can draw conclusions about which conditions promote faster yeast growth. Remember to record your observations and compare the growth in each container. Based on the expected results, it is likely that the yeast in the warm water and warm sweetened water will show the most significant growth, while the yeast in the cold water and cold sweetened water may grow more slowly. The yeast in the plain warm water may exhibit moderate growth.

Please note that the actual results may vary depending on various factors, such as the quality of the yeast, the temperature of the water, and the specific conditions of the experiment. It is always important to conduct multiple trials and replicate the experiment to ensure the reliability of the results.