Answered: Use the experiment written below to…

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter25: The Origin Of Life

Section: Chapter Questions

Problem 1ITD

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Use the experiment written below to answer questions about the scientific method.

Transcribed Image Text:Name: Date: Period: Directions: Use the experiment written below to answer questions about the scientific method. Growing Yeast Marilyn was working with baking yeast in her science class. She knew that cooks added yeast to dough to make it rise. Yeasts digest the sugars in the dough to produce carbon dioxide and alcohol. It is the carbon dioxide bubbles trapped in the dough that really causes the dough to rise. Marilyn thought that by adding sugar to baking mixtures she could get the dough to rise faster. To test this idea, she obtained 4 containers from her science teacher. She added 4 heaping teaspoons to the first container, 3 to the second container, 2 to the 3rd container, and only 1 heaping teaspoon full of sugar to the last container. She added some water and stirred until the sugar was dissolved. At this point Marilyn added 2 grams of yeast to each container. She waited about 10 minutes and then made observations about the amount of bubbling in each cup every 5 minutes for the next half an hour. She tabled her results and made her conclusions. qilkanoilolor in E 4. What variable(s) did Marilyn control in this experiment? Mboro aim basta nebull bloo ed asw all daw ad solil begs danoisono 5. Name at least 2 variables that Marilyn did not control in this experiment. Imood 6. Based on this experimental design, will Marilyn's results be qualitative or quantitative? saqu x&M si vdW M 7. If Marilyn used Red Star yeast in the first 2 containers and then ran out of that brand, could she use Baker's Pride brand in the final 2 containers? Why or why not?

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