Question

mona is activating yeast for her bread recipe. she notices that as the yeast activates, it releases bubbles of carbon dioxide. she wonders what factors affect how much carbon dioxide her yeast releases. she has the following supplies available: one jar of yeast, 90°f water, 110°f water, 1 teaspoon of sugar, 1 teaspoon of salt. using only these supplies, which questions can mona investigate with an experiment? select all that apply. does yeast release more carbon dioxide when mixed with 90°f water and 1 teaspoon of sugar or when mixed with 90°f water and 1 teaspoon of salt? does yeast release more carbon dioxide when mixed with 90°f water or when mixed with 110°f water? does yeast release more carbon dioxide when mixed with 110°f water and 1 teaspoon of sugar or when mixed with 110°f water and 1 teaspoon of salt? does yeast release more carbon dioxide when mixed with 110°f water and 1 teaspoon of sugar or when mixed with 110°f water and no sugar?

Explanation:

Step1: Identify available supplies

Supplies are yeast, 90°F water, 110°F water, sugar, salt.

Step2: Analyze each question

All questions can be tested by varying one factor (sugar/salt presence, water - temperature) while keeping others relatively constant and observing carbon - dioxide release.

Answer:

All of the above questions can be investigated with an experiment using the given supplies.

1. Does yeast release more carbon dioxide when mixed with 90°F water and 1 teaspoon of sugar or when mixed with 90°F water and 1 teaspoon of salt?
2. Does yeast release more carbon dioxide when mixed with 90°F water or when mixed with 110°F water?
3. Does yeast release more carbon dioxide when mixed with 110°F water and 1 teaspoon of sugar or when mixed with 110°F water and 1 teaspoon of salt?
4. Does yeast release more carbon dioxide when mixed with 110°F water and 1 teaspoon of sugar or when mixed with 110°F water and no sugar?