Testing cereals

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How can you find which cereal has the most sugar in it?

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Testing cereals

  1. 1. Focus Question: HowFocus Question: How can you test the amountcan you test the amount of sugar in a substance?of sugar in a substance? Investigation 3 - Part 3Investigation 3 - Part 3
  2. 2. Cellular Respiration Questions • Why do people eat food? • How do your cells get energy from the food you eat? • How to plant cells get the energy they need? • What happens during cellular respiration?
  3. 3. Testing Cereals • Selection of different breakfast cereals – Do you think they might contain sugar? – Which one has the most sugar and which has the least? – Can you design an investigation to find out? • 3 minutes - talk in groups to outline an investigation for testing the cereals for sugar content
  4. 4. Plan • Test 2 cereals – Possible “high sugar” and “low sugar” – Mrs. L will test control with 3 gr pure sugar • Amounts per bag – 2 spoons yeast – 3 grams cereal – 50 ml water (40-50ºC) • Measure CO2 @ 10 min. & 20 min • Write up plan on Sugar Test A
  5. 5. Testing • Record CO2 levels on Sugar Test B and class chart @ 10 min. & 20 min. • Evaluate Results – Yeast breaks down sugar for energy – Produces carbon dioxide as waste – The more sugar: The more carbon dioxide • Rank cereals and write conclusion
  6. 6. Homework • I-check 3 on Thursday • Start reviewing for Living Systems Unit test – March 5th
  7. 7. Sugar and Cells • What does chlorophyll do? • What raw materials do plants use to make sugar? • Why do plants make sugar? • What happens to sugar when it is used in cells? • How do your cells obtain energy from the Sun?

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