You have a 32-year-old fer ale patient with the following anthropometric measurements: Weight: 120 lb Height: 5ft 4 in BMI: 20.6 kg/m2
She has been keeping a diet record, and after analyzing it, you find that her average energy intake for each meal/snack
is as follows:
Breakfast: 500 kcal
Midmorning snack: 200 kcal
Lunch: 1000 kcal
Afternoon snack 250 kcal
Dinner. 550 kcal
Evening snack: 400 kcal
1. Thus, her total energy intake averages
kcal/day.
You calculate her basal energy needs according to the Mifflin-St. Jeor equation and find that her basal energy
expenditure (BEE) is 1240.5 kcal/day. She reports a very active lifestyle. Therefore, you multiply her BEE by a physical
activity factor of 1.725. Her total energy expenditure is 2140 kcal/day.
2. You explain to your patient that she eats more kilocalories than she is using in a given day, thus she has a positive
energy balance of kcal/day.
Questions for Analysis
3. If she continues to consume and burn the same amount of energy, how long will it take for her to gain a pound of
fat?
DAYS
4. How would you recommend that she change her lifestyle to maintain her current weight?

Environmental science studies the interactions between the physical, chemical, and biological components of the environment, including their effects on all types of organisms. earth science (also known as geoscience), is an inclusive term for all sciences related to earth (geology, meteorology, oceanogr maphy, etc).  although environmental and earth science cover essentially the same material, environmental science places greater emphasis on the biological realm, while earth science places greater emphasis on the physical realm.    environmental and earth science study the interactions of four major systems or “spheres” (figure 8.6).  the  geosphere  consists of the core, mantle and crust of the earth.the  atmosphere  contains all of the earth’s air and is divided into troposphere, stratosphere, mesosphere, thermosphere and ionosphere.the  hydrosphere  contains all of the solid, liquid and gaseous water on earth, extending from the depths of the sea to the upper reaches of the troposphere where water is found.  ninety-seven percent of the hydrosphere is found in salty oceans, and the remainder is found as vapor or droplets in the atmosphere and as liquid in ground water, lakes, rivers, glaciers and snowfields.  the  biosphere  is the collection of all earth’s life forms, distributed in major life zones known as biomes:   tundra, boreal forest, temperate deciduous forest, temperate grassland, desert, savannah, tropical rainforest, chaparral, freshwater, and marine.although the four systems have their unique identities, there is substantial interaction between them.  environmental scientists study the effects of events in one sphere on the other spheres. for example, a volcanic eruption in the geosphere may cause profound direct and indirect effects on the hydrosphere, atmosphere and biosphere as follows: example 1 (volcano)    on may 18, 1980, mount saint helens, in the state of washington, erupted.  this event altered the surrounding environment, and provided scientists with an opportunity to study the effects of volcanic eruptions on the geosphere, hydrosphere, atmosphere and biosphere.  such studies are vital because volcanic eruptions will continue to occur, and will have increasing impact on humans as people continue to settle lands closer to dormant volcanoes. the following are but a few of the myriad of interactions resulting from a volcanic 

Compound light microscope