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Lesson 19: To Drink or Not to Drink
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For more information about the understandings, essential questions, and alignment of this lesson to National Health Education Standards, State Standards, please visit our website, www.roadoflife.org
Background: As children age, they begin to consume more and more unhealthy beverages including pop and artificial fruit juices instead of water, milk and natural fruit juices. Taste tends to persuade the decision-making process of youth, and the concept of drinking healthy beverages is somewhat forgotten during the shift from adolescence to adulthood. However, what you drink affects your health, and neglecting to choose healthy beverages that serve as replenishment and provide necessary nutrients for the body results in negative consequences.
•Begin by brainstorming the meaning of nutrients and dehydration. Nutrients are substances that help nourish the body. Inform students that nutrients are responsible for helping hair, nails, teeth, and gums stronger and making skin clear and healthy. Nutrients give energy, help to speed up the healing process from illnesses and can help improve eyesight. Nutrients also aid in concentration and clarity in thinking. Dehydration occurs when you lose too much water from your body before you are able to replace water by drinking the recommended amount of water. The recommended amount of water to drink for children includes 3-5 glasses of water per day. Inform students that symptoms of dehydration include headaches, feeling hungry, irritability, tiredness, dizziness, and nausea.
•Create a list of beverages by identifying the students’ favorite drinks or the beverages that students prefer to drink. Write the results on the chalkboard or on a transparency so that the children can see the different types of beverages. Did the students mention water, milk and 100% fruit juice in their responses? Ask the students if there is a difference between different types of fruit juices. Explain to students that although there are a variety of different beverages available to drink, water, 100% fruit juices and milk are the best beverages to drink because they provide nutrients and prevent dehydration.
- Water replenishes the body and prevents dehydration.
- 100% Fruit Juice has important nutrients including Vitamin C.
- Milk is an important source of calcium and can include Vitamin D that helps keep bones healthy and strong.
In contrast, pop and artificial fruit juices are not beneficial to drink.
- Pop aids in dehydration and bone calcium depletion.
- Artificial fruit juices do not have the essential vitamins and nutrients that are useful for helping the body stay healthy.
Explain to students that drinking water, 100% fruit juices, and milk will help in preventing dehydration and aid in acquiring nutrients that help keep your body healthy.
•To reinforce these concepts students will do three scientific experiments that will explore the concept of dehydration, and examine the nutrient concentration of beverages. Each experiment teaches the students how to use the scientific process to produce an evidence-based conclusion. Each experiment builds on the previous to improve scientific experimental skills. The first experiment focuses on writing a hypothesis. The second experiment focuses on following a procedure, and collection of data and the third experiment involves writing a conclusion based on the results. Since there are three different experiments, each activity can be done separately.
Learning Activity: Sponge-Bobby Demonstration
Explanation of Experiment:
This demonstration helps to show that our bodies lose water while doing everyday activities and how it is important to drink water to stay hydrated.
Take a 4” x 6” sponge and draw a man on it, like the outline of a gingerbread man. Cut the sponge-man out using scissors. Sit the sponge out for four days before using it in the lesson, so that it is dried out and stiff to begin the lesson.
Note to Teacher: This demonstration can conclude after several hours or several days, depending on how long it takes the sponge to completely dry out. Therefore, it is important that enough water is added to the sponge so that information can be collected at two time periods. Students should observe Sponge-Bobby in the wet stage and in the dry stage.
Learning Activity: Vitamin C Experiment
Explanation of Experiment:
In this experiment, each group will make an Iodine-Starch solution which will enable them to identify the beverage that has the most Vitamin C. The nutrient Vitamin C in each beverage will react with iodine, turning the Iodine-Starch solution from blue to clear. The beverage that has the most Vitamin C will require the least amount of drops to turn the Iodine-Starch solution from blue to clear. Orange Juice should have the most Vitamin C in comparison to Orange Kool-Aid. Therefore, orange juice should require the least number of drops to react with iodine, turning the solution from blue to clear. This reaction will demonstrate that some foods and drinks have more nutrients than others, even if they look and taste similar.
For each group, you will need each of these things:
· Lab Sheet
· Writing materials
· Spray Starch
· 4 plastic cups per group
· Container of warm water
· 2 teaspoons per group
· 2 eye droppers per group
· Orange Kool-Aid and
Lay out the materials that the students will need for the experiment. Make sure to have warm water available for students to use for the Vitamin C Test Cups. Also, label two cups orange Kool-Aid and orange juice. Fill each cup with the correct beverage.
At the conclusion of the experiment, write the results of each group on the chalkboard. Have the students calculate the classroom averages for the orange Kool-Aid and orange juice within their groups.