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8th Grade Chapter 2 Sec 1 Food and Energy

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8th Grade Chapter 2 Sec 1 Food and Energy

  1. 1. Ch. 2 Sec. 1 Food & Digestion
  2. 2. calorie <ul><li>amount of energy needed to raise temp. of 1 gram of water by 1 Celsius degree </li></ul><ul><li>1 C alorie = 1,000 calories </li></ul><ul><li>more calories = more energy </li></ul><ul><li>more active you are  more calories needed </li></ul>one serving of popcorn may contain 60 Calories (60 kcal), or 60,000 calories, of energy
  3. 3. nutrients <ul><li>substances in food that provide raw materials & energy body needs to carry out all essential processes </li></ul>
  4. 6. nutrients carbo- hydrates fats protein vitamins minerals water
  5. 7. <ul><li>= 4 Calories of energy </li></ul><ul><li>divided into 2 groups </li></ul>
  6. 8. 1. simple carbohydrates <ul><li>a.k.a. sugars </li></ul><ul><li>found naturally in fruits, milk & vegetables </li></ul><ul><li>glucose = main source of energy </li></ul>
  7. 9. 2. complex carbohydrates <ul><li>eg. fiber </li></ul><ul><ul><li>can not be digested </li></ul></ul><ul><ul><li>found in plant foods </li></ul></ul>
  8. 11. fats <ul><li>provide 2X as much as energy as carbs. </li></ul><ul><li>classified in 2 groups </li></ul>
  9. 12. fats <ul><li>1. unsaturated fats </li></ul><ul><ul><li>liquid at room temp </li></ul></ul><ul><ul><li>ex. olive oil </li></ul></ul>
  10. 13. fats <ul><li>2. saturated fats </li></ul><ul><ul><li>solid at room temp. </li></ul></ul><ul><ul><li>foods that have saturated fat </li></ul></ul><ul><ul><li>contain cholesterol = waxy, fatlike substance found only in animal products </li></ul></ul><ul><ul><ul><li>made by liver </li></ul></ul></ul>
  11. 15. Activity- Do snack foods contain fat? Describe mark on bag Fat (Yes or no) Peanut butter Cheese spread cracker Pretzel Peanut butter chips Chocolate chips Popcorn Prediction Food
  12. 17. <ul><li>needed for tissue growth & repair </li></ul><ul><li>made up of amino acids </li></ul><ul><li>2 types of proteins: </li></ul><ul><li>1. complete </li></ul><ul><li>2. incomplete </li></ul>
  13. 18. proteins incomplete proteins
  14. 21. vitamins <ul><li>2 types: </li></ul><ul><li>fat soluble </li></ul><ul><li>water soluble </li></ul>Scurvy Song-Pink
  15. 24. minerals <ul><li>not made by living things </li></ul><ul><li>present in soil </li></ul><ul><li>absorbed by plants thru roots </li></ul>
  16. 27. water <ul><li>most important nutrient </li></ul>
  17. 28. Carbohydrates, Proteins, Fats, Vitamins, and Minerals [04:25]
  18. 29. Name that nutrient
  19. 30. vitamins <ul><li>2 types: </li></ul><ul><li>fat soluble </li></ul><ul><li>water soluble </li></ul>
  20. 31. water <ul><li>most important nutrient </li></ul>
  21. 32. complex carbohydrates <ul><li>eg. fiber </li></ul><ul><li>can not be digested </li></ul><ul><li>found in plant foods </li></ul>
  22. 33. minerals <ul><li>not made by living things </li></ul><ul><li>present in soil </li></ul><ul><li>absorbed by plants thru roots </li></ul>
  23. 34. simple carbohydrates <ul><li>a.k.a. sugars </li></ul><ul><li>found naturally in fruits, milk & vegetables </li></ul><ul><li>glucose = main source of energy </li></ul>
  24. 35. <ul><li>made up of amino acids </li></ul>
  25. 36. fats <ul><li>provide 2X as much as energy as carbs. </li></ul><ul><li>classified in 2 groups: </li></ul><ul><ul><li>saturated & unsaturated </li></ul></ul>
  26. 38. <ul><li>Pour some of the food into a Ziploc bag. Seal the bag with as little air in it as possible, then mash the food until you make a powder. </li></ul><ul><li>Fill the bag with some water and mix. </li></ul><ul><li>Let the mixture sit for at least one hour. </li></ul><ul><li>After the cereal mixture has been allowed to sit, pour some into a plastic cup. </li></ul><ul><li>Move a strong magnet against the side of the cup for about a minute. You should observe iron particles collecting on the side of the cup! </li></ul>

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