7. Critique: On this page, describe the advantages and disadvantages of the model of human homeostasis used in the Gizmo. In what ways is the model realistic? What factors are not included in the model?​

PRIOR KNOWLEDGE QUESTIONS (Do these BEFORE using the Gizmo.)

A thermostat is a device that regulates the temperature inside a building.

Answer the questions on your student sheet.

GIZMO WARM-UP

To survive, an organism must be able to maintain stable

internal conditions in a changing environment. This

process is called homeostasis.

The Human Homeostasis Gizmo™ allows you to explore

how the human body stays at a nearly constant

temperature in different conditions.

Notice the Air temp. and Body temp. thermometers

representing the air temperature and body temperature.

Answer the questions on your student sheet.

1. What is the initial air temperature?

2. What is the initial body temperature?

3. Next to each factor, write “increase,” “decrease,” or “same” based on how you

expect that factor to affect body temperature.

The model in the Human Homeostasis Gizmo is realistic because it shows the effects of exercise, sweating, clothing, body position, sweating, and outside temperature on human body temperature. The Gizmo also illustrates the relationship between sweating and dehydration and the relationship between exercising and hunger. Several factors are not considered in the Gizmo. These include blood flow to the skin (vasoconstriction and vasodilation), metabolism, body fat, body shape, age, and other individual characteristics. Every person reacts to hot or cold temperatures differently and may need a different amount of clothing, exercise, or sweating to maintain a constant body temperature in hot or cold weather.

why many students visually perceive stem as a vapid class?

for many students, however, stem subjects are optically discerned as vapid, tedious, and destitute of authentic-world applications. science and math have always been a major part of the high school curriculum, but many students have disengaged from these subjects because they don’t optically discern that they have any pertinence to the authentic world or students’ daily lives. for them, math and science have become a set of rules, procedures, laws, theorems, and formulas to memorize. some students even develop math apprehensiveness and cerebrate they are incapable of learning higher-level mathematics.

why is stem paramount?

as the u.s. economy changes, the ordinant dictation for stem-capable workers is growing. in may of 2014, the u.s. bureau of labor statistics counted more than 8.3 million stem jobs, which accounted for 6.2 percent of total employment in the cumulated states. that number is expected to perpetuate to increment as u.s. companies grow and innovate to compete in the ecumenical economy. according to the u.s. department of labor, the average salary for all stem jobs is $85,570, which is virtually double the average salary for all jobs.

many people still envision stem professionals as wearing a white lab coat and conducting research in a laboratory. in authenticity, some of the most in-demand stem fields are petroleum engineering, process engineering, and computer engineering. these fields that are experiencing shortages of qualified candidates are additionally among the highest paying, with the average petroleum engineer earning an annual salary of $147,520 in may 2014 according to the u.s. bureau of labor statistics.

in additament, stem subjects edify students valuable skills that are vital for prosperity in all vocations, even those that do not directly require stem erudition. engagement in stem subjects avails students develop quandary-solving, critical mentally conceiving, and leadership skills. these skills are so ecumenical, in fact, that statistics relinquished in the summer of 2013 by the u.s. census bureau designated that about three-quarters of the people with a bachelor’s degree in stem fields are not working in those vocations. many non-stem employers are poaching stem-qualified job candidates because they are more ingenious and collaborative than their non-stem counterparts.

as the ecumenical economy perpetuates to evolve, the desideratum for stem-capable workers will perpetuate to grow. by getting edifiers and students involved in the stem kineticism, an incipient generation of adroit workers will be poised to energize and expand this exhilarating field.

check this over.

1. loamy sand is about 80% sand with 10% clay and defined mostly by sand particles with some clay to provide structure and fertility. the sand particles are easily visible and the soil holds structure but breaks apart easily.

2. scott sand can improve his soil quality by incorporating more silt and organic matter into the soil. peat moss and organic matter can also be incorporated.