More Power To You! The Energy in Food

Transcription

1 Slide 1 Food Science More Power To You! The Energy in Food

2 Slide 2 Copyright Copyright Texas Education Agency, These Materials are copyrighted and trademarked as the property of the Texas Education Agency (TEA) and may not be reproduced without the express written permission of TEA, except under the following conditions: 1) Texas public school districts, charter schools, and Education Service Centers may reproduce and use copies of the Materials and Related Materials for the districts and schools educational use without obtaining permission from TEA. 2) Residents of the state of Texas may reproduce and use copies of the Materials and Related Materials for individual personal use only, without obtaining written permission of TEA. 3) Any portion reproduced must be reproduced in its entirety and remain unedited, unaltered and unchanged in any way. 4) No monetary charge can be made for the reproduced materials or any document containing them; however, a reasonable charge to cover only the cost of reproduction and distribution may be charged. Private entities or persons located in Texas that are nottexas public school districts, Texas Education Service Centers, or Texas charter schools or any entity, whether public or private, educational or non-educational, located outside the state of Texas MUST obtain written approval from TEA and will be required to enter into a license agreement that may involve the payment of a licensing fee or a royalty. For information contact: Office of Copyrights, Trademarks, License Agreements, and Royalties, Texas Education Agency, 1701 N. Congress Ave., Austin, TX ; phone ; copyrights@tea.state.tx.us.

3 Slide 3 Food Chain The series of processes by which food is grown or produced, sold and eventually consumed 3 Organisms get food from other organisms and from the environment. The food chain is a flow of food energy from simpler to more complex organisms.

4 Slide 4 Sun supplies light Producers produce food Consumers herbivore - eats only plant carnivore - eats other animals omnivore - eats both plants and animals Decomposers bacteria and fungi 4 There are four main components to the food chain. The sun supplies light that is needed to make food. The producers make or produce food. Consumers must eat other organisms to survive. A herbivore only eats plants such as cows and sheep A carnivore eats other animals such as cats, hawks and wolves An omnivore eats both plants and animals such as chickens, pigs and humans Decomposers break down dead matter and return the nutrients to the environment such as bacteria and fungi.

5 Slide 5 How Does Food Provide Energy? In nutrients Carbohydrates Fats Protein Calories The energy needed to raise the temperature of 1 kilogram of water through 1 C 5 Food provides energy in the form of calories that give our bodies fuel to perform all functions from the most basic like breathing, to more complicated activities. We need a minimum amount of calories from food to sustain basic metabolic functions and more to carry out physical activities. Nutrients are a substance that provides nourishment essential for growth and the maintenance of life.

6 Slide 6 Energy and Food Energy Requirements Body Mass Index 6 The more active we are, the more food we need.

7 Slide 7 Energy Requirements Adults (18 to 64 years) 2 ½ hours each week Children and adolescents (6 to 17 years) 60 minutes or more each day Young children (2 to 5 years) No specific recommendation but should be active each day Source: ChooseMyPlate.gov 7 Physical activity is generally safe for everyone. The health benefits gained from being active are far greater than the chances of getting hurt.

8 Slide 8 Energy Imbalances Same amount of calories + same amount of activity = energy balance Weight is maintained More calories less activity = energy imbalance Could lead to weight gain 8 Eating the same amount of calories and exerting physical activity equals an energy balance. If you eat more calories than exerting physical activity equals an energy imbalance which could lead to weight gain. Eating fewer calories and increasing physical activity could mean weight loss.

9 Slide 9 Body Mass Index BMI - A ratio that allows you to assess your body size in relation to your height and weight Formula: weight (lb) / [height (in)]2 x 703 Calculate BMI by dividing weight in pounds (lbs) by height in inches (in) squared and multiplying by a conversion factor of BMI is a fairly reliable indicator of body fatness for most people. BMI can be considered an alternative for direct measures of body fat. It is an inexpensive and easy-to-perform method of screening for weight categories that may lead to health problems. What is your BMI? We will figure this out later in the lesson.

10 Slide 10 (image from video) Finding A Balance (click on link) 10 Click on hyperlink to view video: Finding Balance More than one third of U.S. adults are obese. Weight gain occurs when you consume more calories than your body uses. Reaching and maintaining a healthy weight will help you prevent and control many diseases and conditions. The key is FINDING A BALANCE in your lifestyle that includes healthy eating and regular physical activity.

11 Slide 11 11

12 Slide 12 References and Resources Images: Shutterstock images. Photos obtained with subscription. (Slides 1, 5, 6, 7, 8, 9, 11) Textbooks: Duyff, R. L. (2010). Food, nutrition & wellness. Columbus, OH: Glencoe/McGraw-Hill. Food for today. (2010). Woodland Hills, CA: McGrawHill/Glencoe. Mehas, K. Y., & Rodgers, S. L. (2002). Food science: The biochemistry of food and nutrition. New York, NY: Glencoe/McGraw-Hill. Websites: ChooseMyPlate.gov Physical activity is important for everyone, but how much you need depends on your age. Healthy Weight - it's not a diet, it's a lifestyle! When it comes to weight loss, there's no lack of fad diets promising fast results. But such diets limit your nutritional intake, can be unhealthy, and tend to fail in the long run. Video: Finding Balance More than one third of U.S. adults are obese. Weight gain occurs when you consume more calories than your body uses. Reaching and maintaining a healthy weight will help you prevent and control many diseases and conditions. The key is FINDING A BALANCE in your lifestyle that includes healthy eating and regular physical activity.