8th grade chapter 2 sec 1 food and energy
TRANSCRIPT
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Ch. 2 Sec. 1 Food & Digestion
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calorie• amount of energy needed to raise temp. of
1 gram of water by 1 Celsius degree
• 1 Calorie = 1,000 calories
• more calories = more energy
• more active you are more calories needed
1 serving of popcorn may contain 60 Calories (60 kcal), or 60,000
calories, of energy
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nutrients• substances in food that
provide raw materials & energy body needs to carry out all essential processes
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nutrients
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•divided into 2 groups•1 gm = 4 calories
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1. simple carbohydrates• a.k.a. sugars
• found naturally in fruits, milk & vegetables
• glucose= main source of energy
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fiber•can not be digested
•found in plant foods
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fats•provide 2X as much as energy as carbs.
•1 gm = 9 calories
•classified in 2 groupsMeet the Fats
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fats
• 1. unsaturated fats
–liquid at room temp
–ex. olive oil
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fats
• 2. saturated fats–solid at room temp.–foods that have saturated fat –contain cholesterol= waxy, fatlike substance found only in animal products•made by liver
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Activity- Do snack foods contain fat?
Food Prediction Describe mark on bag
Fat
(Yes or no)Popcorn
Chocolate chips
Peanut butter chips
Pretzel
cracker
Cheese spread
Peanut butter
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• needed for tissue growth & repair
• made up of amino acids
• 2 types of proteins:
1. complete
2. incomplete
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incomplete proteins
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vitamins
• 2 types:
1.fat soluble
2.water soluble
Scurvy Song-Pink
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minerals• not made by living things
• present in soil
• absorbed by plants thru roots
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water• most important
nutrient
• need 2 L daily
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Carbohydrates, Proteins, Fats, Vitamins, and Minerals [04:25]
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vitamins• 2 types:
1.fat soluble
2.water soluble
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watermost important
nutrient
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complex carbohydrates
•eg. fiber
•can not be digested
•found in plant foods
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minerals
• not made by living things
• present in soil
• absorbed by plants thru roots
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simple carbohydrates• a.k.a. sugars
• found naturally in fruits, milk & vegetables
• glucose= main source of energy
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• made up of amino acids
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waterNeed 2L daily
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fats
• provide 2X as much as energy as carbs.
• classified in 2 groups:–saturated & unsaturated
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1. 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.
2. Fill the bag with some water and mix. 3. Let the mixture sit for at least one hour. 4. After the cereal mixture has been allowed to sit, pour
some into a plastic cup. 5. 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!