More Power To You
Food ScienceMore Power To You!The Energy in Food
1Copyright Texas Education Agency, 2012. All rights
reserved.CopyrightCopyright Texas Education Agency, 2015. These
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[email protected] Texas Education Agency, 2015.
All rights reserved.Food ChainThe series of processes by which food
is grown or produced, sold and eventually consumed3Copyright Texas
Education Agency, 2015. All rights reserved.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. Copyright Texas Education Agency, 2012. All
rights reserved.34Copyright Texas Education Agency, 2015. All
rights reserved.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 sheepA
carnivore eats other animals such as cats, hawks and wolvesAn
omnivore eats both plants and animals such as chickens, pigs and
humansDecomposers break down dead matter and return the nutrients
to the environment such as bacteria and fungi.
Copyright Texas Education Agency, 2012. All rights reserved.4How
Does Food Provide Energy?5In nutrientsCarbohydratesFatsProtein
CalorieA unit of energy supplied by food
Copyright Texas Education Agency, 2015. All rights reserved.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.
Copyright Texas Education Agency, 2012. All rights
reserved.5
Energy and FoodEnergy RequirementsBody Mass Index6Copyright
Texas Education Agency, 2015. All rights reserved.The more active
we are, the more food we need.Copyright Texas Education Agency,
2012. All rights reserved.6Energy Requirements7Adults (18 to 64
years) 2 hours each weekChildren and adolescents (6 to 17 years)60
minutes or more each dayYoung children (2 to 5 years)No specific
recommendation but should be active each day
Source: ChooseMyPlate.gov
Copyright Texas Education Agency, 2015. All rights
reserved.Physical activity is generally safe for everyone.
The health benefits gained from being active are far greater
than the chances of getting hurt.
7Copyright Texas Education Agency, 2012. All rights
reserved.Energy Imbalances8Same amount of calories + same amount of
activity = energy balanceWeight is maintainedMore calories less
activity = energy imbalanceCould lead to weight gain
Copyright Texas Education Agency, 2015. All rights
reserved.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. 8Copyright Texas Education Agency, 2012. All
rights reserved.Body Mass Index9BMI - A ratio that allows you to
assess your body size in relation to your height and
weightFormula: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 703
Copyright Texas Education Agency, 2015. All rights reserved.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.Copyright Texas Education Agency, 2012. All rights
reserved.9Finding A Balance10
(click on link)(image from video)Copyright Texas Education
Agency, 2015. All rights reserved.Click on hyperlink to view
video:Finding BalanceMore 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
isFINDINGABALANCEin your lifestyle that includes healthy eating and
regular physical
activity.http://www.cdc.gov/CDCTV/FindingBalance/index.html
Copyright Texas Education Agency, 2012. All rights
reserved.1011Copyright Texas Education Agency, 2015. All rights
reserved.
References and ResourcesImages: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.govPhysical
activity is important for everyone, but how much you need depends
on your
age.http://www.choosemyplate.gov/physical-activity/amount.htmlHealthy
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.http://www.cdc.gov/healthyweight/index.htmlVideo: Finding
BalanceMore 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.http://www.cdc.gov/CDCTV/FindingBalance/index.htmlCopyright
Texas Education Agency, 2015. All rights reserved.
