Yeast Investigation Investigation 3 - Part 2
<ul><li>What are two most abundant ingredients on cookie labels? </li></ul><ul><ul><li>Flour </li></ul></ul><ul><ul><li>Su...
Flour/Sugar Investigation <ul><li>Mark one bag “F” and one bag “S” </li></ul><ul><li>Add 2 5-ml spoons of yeast and 1 5-ml...
Carbon Dioxide - CO 2 <ul><li>Cookie bag puffed - yeast produced a gas when it became active </li></ul><ul><li>Gas produce...
Volume Tube <ul><li>Used to measure volume of carbon dioxide produced by yeast </li></ul><ul><li>Carbon dioxide measured i...
Cellular Respiration <ul><li>Yeast uses sugar as food source </li></ul><ul><li>Plant and animal cells use sugar as food so...
Cellular Respiration <ul><li>C 6 H 12 O 6  + 6O 2  6CO 2  + 6H 2 O +Energy </li></ul>
Vocabulary <ul><li>Yeast - single-celled organism </li></ul><ul><li>Cellular respiration - process by which plant and anim...
Concepts <ul><li>What is cellular respiration? </li></ul><ul><ul><li>Cellular respiration is the process by which plant an...
Response Sheet –  Sugar and Cells <ul><li>Complete Response Sheet </li></ul><ul><li>Brian wrote – Plant cells get energy f...
Homework <ul><li>Read Cellular Respiration, pg 119 – 126 and answer questions in notebook. </li></ul>
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Yeast investigation - Part 2

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Is it Flour or Sugar that activates the yeast?

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Yeast investigation - Part 2

  1. 1. Yeast Investigation Investigation 3 - Part 2
  2. 2. <ul><li>What are two most abundant ingredients on cookie labels? </li></ul><ul><ul><li>Flour </li></ul></ul><ul><ul><li>Sugar </li></ul></ul><ul><li>Something in cookie is food for yeast. </li></ul><ul><li>Think of a way to find out what is in the cookie that is food for yeast. </li></ul><ul><li>Is one of the ingredients the food that activated the yeast? </li></ul>
  3. 3. Flour/Sugar Investigation <ul><li>Mark one bag “F” and one bag “S” </li></ul><ul><li>Add 2 5-ml spoons of yeast and 1 5-ml spoon of flour or sugar to each bag </li></ul><ul><li>Add 50 ml warm (40-50ºC) water to each bag </li></ul><ul><li>Press air out and seal bag. </li></ul><ul><li>Place in hot water bath for 10 minutes </li></ul><ul><li>Write prediction of what you think will happen while waiting </li></ul>
  4. 4. Carbon Dioxide - CO 2 <ul><li>Cookie bag puffed - yeast produced a gas when it became active </li></ul><ul><li>Gas produced in Carbon Dioxide </li></ul><ul><li>Same gas we exhale </li></ul><ul><li>Amount of Carbon Dioxide produced is indication of amount of activity taking place in yeast cells </li></ul>
  5. 5. Volume Tube <ul><li>Used to measure volume of carbon dioxide produced by yeast </li></ul><ul><li>Carbon dioxide measured in milliliters </li></ul><ul><li>Measure gas produced by flour and sugar bags after 10 minutes </li></ul><ul><li>Record results on chart </li></ul><ul><li>Is it flour or sugar that activates the yeast? </li></ul>
  6. 6. Cellular Respiration <ul><li>Yeast uses sugar as food source </li></ul><ul><li>Plant and animal cells use sugar as food source </li></ul><ul><li>When cells use sugar - get energy and produce carbon dioxide and water </li></ul><ul><li>Process of breaking down sugar for energy called Cellular Respiration </li></ul><ul><li>Cellular Respiration breaks sugar into carbon dioxide , water , and energy </li></ul>
  7. 7. Cellular Respiration <ul><li>C 6 H 12 O 6 + 6O 2  6CO 2 + 6H 2 O +Energy </li></ul>
  8. 8. Vocabulary <ul><li>Yeast - single-celled organism </li></ul><ul><li>Cellular respiration - process by which plant and animal cells break down sugar to get energy, releasing carbon dioxide and water in the process </li></ul>
  9. 9. Concepts <ul><li>What is cellular respiration? </li></ul><ul><ul><li>Cellular respiration is the process by which plant and animal cells break down sugar to get energy, releasing carbon dioxide and water in the process </li></ul></ul><ul><li>C 6 H 12 O 6 + 6O 2  6CO 2 + 6H 2 O +Energy </li></ul>
  10. 10. Response Sheet – Sugar and Cells <ul><li>Complete Response Sheet </li></ul><ul><li>Brian wrote – Plant cells get energy from the Sun. Animal cells get energy from food. </li></ul><ul><li>Elana said, “That’s part of the story, but there’s more.” </li></ul><ul><li>What would Elana explain to Brian about how cells get energy? </li></ul>
  11. 11. Homework <ul><li>Read Cellular Respiration, pg 119 – 126 and answer questions in notebook. </li></ul>

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