BIOC58H3 Lecture : Lecture 4

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orangeherring876

14 Feb 2011

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Keep it with you so you can reference as it will understand where you are regarding a variety of issues. At least for the next couple of lectures bring it with you. Bio-fuels are what the lab is about this week. This is an extremely important area so i won"t discuss it today. The argument is that they will replace or significantly substitute for fossil fuels. You will see where we have been as a benchmark and potentially where we are going. About 10% of the earth"s land surface is permanently covered in ice. Only a tiny fraction happens outside of greenland and antarctica. On an average (not including recent estimates) ice also covers about 7% of the world"s oceans. Snow covers 49% of the lands surface in the. This is relevant because of albedo which is the extent to which an object reflects light.

Related Questions

Need answer for this and it has must be 250 words and the answer must relate to the question. Please also reference any sources (quotes) you use at the end of your response.

1. The hydrologic system purifies water in nature. Find way that humans mimic this system to purify the water that we use.

2. We hear a lot about climate change and global warming. Do some research on how global warming is affecting the glaciers present today and how that can affect us now and in the future.

3. How could scientists have found similar life forms from the same Mesozoic era on different continents.

4. What is the Ring of Fire? Where is it located and why is it the way it is?â

5. A volcano is a natural occurrence and generally thought of as a disaster. How can volcanos be good for people?

6. Catastrophism was the prevailing theory as to why the earth looked like it did in the 1600âs and 1700âs. Talk about what the theory was, why it was popular and why we know better today.

7. Why is global warming affecting the salinity of the worldâs oceans and why is this important. What effects does this have?

8. Humans, including myself, love the beach. Most people dream of having a house right on the water. However with the shore being such a dynamic, changing environment this isnât always such a great idea. Talk about some of the lengths humans go to to preserve their costal properties and communities.

9. Please discuss the depletion of our ozone layer. Why we should care, what is causing it and what can we do to stop it?

10. Water is a huge part of our atmosphere and the cause all of our precipitation. Describe the weather in your area today or in this season and describe the science behind the weather and what is happening in the atmosphere around you. Example: humid, dry, raining, snowing, sleet, freezing rain, fog, hail.

Match each important characteristic or process of Titan'satmosphere with the gas(es) and/or mechanism(s) that are thought tobe responsible.

A. Titan experiences clouds, rainfall, evaporation, and ice -the three phases of methane - as on Earth we experience the threephases of water, due to...

B. Atmospheric methane lost to photodissociation and otherchemical reactions must be replaced from...

C. Nitrogen, N2, is the dominant gas. The nitrogen comesfrom...

D. The temperature profile with altitude includes an inversionproducing a stratosphere, as on Earth (and no other planets). Thesource of heat in the upper atmosphere is...

E. An orange "tholin haze" colors the lower atmosphere. The hazeis due to...

F. Hydrogen is produced by photodissociation of methane but isnot observed in the atmosphere because of...

Micron-sized particles of hydrocarbons and other organicmolecules, formed via photochemical reactions in the upperatmosphere.

Dissociation of ammonia, NH3, incorporated in Titan at itsformation.

Absorption of sunlight by methane, CH4, in the upperatmosphere.

The surface temperature and pressure of Titan being close to thetriple point of methane.

Evaporation of methane from surface lakes on short timescales,and release from Titan's interior via volcanic processes ongeological timescales.

Thermal escape processes, with light gases moving so quicklythey escape Titan's weak gravity.

lilaczebra929

The maintenance of homeostasis is of major importance to all organ systems in the body and the overall survival of the individual. Explain how homeostasis is the maintenance of a dynamic range of environmental qualities rather than holding the internal environment at a set point. What would be wrong with a set point (say for body temperature) rather than a working range of temperatures?

The endocrine system is closely tied to homeostasis functioning. Give two examples of hormones (including their glands of origin and action) that play major roles in homeostatic processes in the body. What happens if these hormones are disrupted in their actions?

Also, look at how we adapt to survival in the outside world. Discuss how maintaining homeostasis gives us greater freedom of activity from dependence upon changes in the external environment. What happens during extremes that force our bodies out of homeostatic bounds? Give specific examples.

Why is the maintenance of homeostasis especially important during development of new humans within the bodies of their mothers? What can go wrong if specific homeostatic functions are disrupted?

goldcattle889

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