Can you continue the multiple choice questions you were writing yesterday? (Pages 14 and 15) Do now!
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Transcript of Can you continue the multiple choice questions you were writing yesterday? (Pages 14 and 15) Do now!
![Page 1: Can you continue the multiple choice questions you were writing yesterday? (Pages 14 and 15) Do now!](https://reader030.fdocuments.us/reader030/viewer/2022032704/56649d7d5503460f94a5fd05/html5/thumbnails/1.jpg)
Can you continue the multiple choice
questions you were writing yesterday? (Pages 14 and 15)
Do now!
![Page 2: Can you continue the multiple choice questions you were writing yesterday? (Pages 14 and 15) Do now!](https://reader030.fdocuments.us/reader030/viewer/2022032704/56649d7d5503460f94a5fd05/html5/thumbnails/2.jpg)
Last lesson
• Absorption of food by the blood
![Page 3: Can you continue the multiple choice questions you were writing yesterday? (Pages 14 and 15) Do now!](https://reader030.fdocuments.us/reader030/viewer/2022032704/56649d7d5503460f94a5fd05/html5/thumbnails/3.jpg)
Read pages 14 and 15 and write 10 multiple choice questions (each
with 4 possible answers) to go with
these pages
![Page 4: Can you continue the multiple choice questions you were writing yesterday? (Pages 14 and 15) Do now!](https://reader030.fdocuments.us/reader030/viewer/2022032704/56649d7d5503460f94a5fd05/html5/thumbnails/4.jpg)
Today’s lesson
• Measuring the energy content of food
![Page 5: Can you continue the multiple choice questions you were writing yesterday? (Pages 14 and 15) Do now!](https://reader030.fdocuments.us/reader030/viewer/2022032704/56649d7d5503460f94a5fd05/html5/thumbnails/5.jpg)
Energy requirements?
![Page 6: Can you continue the multiple choice questions you were writing yesterday? (Pages 14 and 15) Do now!](https://reader030.fdocuments.us/reader030/viewer/2022032704/56649d7d5503460f94a5fd05/html5/thumbnails/6.jpg)
Energy requirements?• Vary with age, activity levels and pregnancy
![Page 7: Can you continue the multiple choice questions you were writing yesterday? (Pages 14 and 15) Do now!](https://reader030.fdocuments.us/reader030/viewer/2022032704/56649d7d5503460f94a5fd05/html5/thumbnails/7.jpg)
Energy content of foods?
• Burn food
• Measure temperature rise of a known mass of water
• Calculate energy released by burning food (using the specific heat capacity of water)
![Page 8: Can you continue the multiple choice questions you were writing yesterday? (Pages 14 and 15) Do now!](https://reader030.fdocuments.us/reader030/viewer/2022032704/56649d7d5503460f94a5fd05/html5/thumbnails/8.jpg)
Let’s do it!
• Measure 10cm3 of water into a test tube• Take temperature of water• Weigh the food• Set light to food and hold it under the test tube• Record final (highest) temperature of water• Record your measurements• Calculate the energy released = 41.9 x temp rise
![Page 9: Can you continue the multiple choice questions you were writing yesterday? (Pages 14 and 15) Do now!](https://reader030.fdocuments.us/reader030/viewer/2022032704/56649d7d5503460f94a5fd05/html5/thumbnails/9.jpg)
Energy in foodsType of snack Mass of
snack (g)
Starting temp (°C)
Finish temp (°C)
Temp rise (°C)
Energy produced (J)(41.9 x temp change)
Energy per gram (J/g)
(Energy divided by mass)
Pork rinds
Cheetos
Raisins
Pasta