Earth Science

Hi all. New to forum, my first goal is to follow the rules, and act in a respectful manor. My question is related to a torque induced precession vs. a Torque-free precession. It is said that earth is precessing as we speak. my valid reasoning is the earth axis has shifted two time in two years. This is verified by Nasa, and also an Italian research team. This statement is true, or false? My second question is if this is a fact, then does the precession follow the tourque induced precession, or the Torque-free precession? When you comment, and i hope you will, include what precession model you support.

Hi guys, At school were researching into the secrets of the ocean. I would like some help identifying some of the areas needing research. I would prefer if you could list a possible application from each science (Chemistry,Biology and Physics). Thanks Alot! and look forward to reading your responses

- We know roughly what we have today, at least in the earth crust. But in what form was the EARTH's matter at the formation of the swirling ball that became the EARTH . Was it in element form, molecules, compounds, mineral, crystal, grit, dust , lump, slush, slime, ice , gas ? .

The significant wave height is defined as [math]H_s = 4 \sqrt{\sigma^2}[/math], where [math]\sigma^2[/math] is the variance of the surfave elevation. The variance of a sine wave is [math]\dfrac{a^2}{2}[/math], where [math]a[/math] is the amplitude of the wave. A single wave [math]sin(t)[/math] thus has a variance of [math]\sigma^2 = \dfrac{1}{2}[/math], and a significant wave height of [math]H_s = 4 \sqrt{\sigma^2} = 4 \sqrt{\dfrac{1}{2}} \approx 2.83 m[/math], while the wave height of the sine wave is only [math]2 \cdot a = 2 m[/math]. How is this possible?

Hey, So I'm doing this research/internship deal -- long story short I told the professor my knowlege of Atmospheric Science was very limited. I have to devise a study to test a hypothesis (or three), but am having a very hard time finding a testable hypothesis. I purchased an atmospheric science textbook (which I would need for next year), and all I have come up with is the following: ****** pressure= temperature X density X constant air pressure ~ temperature X density This expression says that the pressure of the gas is proportional to its density, as long as its temperature does not change. This daily (diurnal) fluctuation of pressure appears to be due…

claim: the recent discovery of microbial populations in deep hydrocarbon reserves should support the claim that there were microbial populations in shallow reserves. claim: The density and quality of hydrocarbons within a reserve affects the type and volume of microbial activity (although it is something I've considered that after getting what we can from a reserve, there might be a short term bloom given the newly found relaxed environment. hydrocarbons of high complexity can be broken again and again for energy) claim: Harvesting fossil fuels dramatically alters the subterranean environment, and therefore the biologic activity. claim: This affect in turn affects t…

The earth has an abundance of radioactive elements whose decay contributes to the molten state of the earths core (or so i am told). How then does this influence the dynamic of seismic activity at hot spots on the earth like the Pacific Ring of Fire? Are there convectional currents of molten magma in the earths core and if there are then how does this all add up to a seismic event on the earths crust?

What is a good name for the force that warps earths atomsphere into domes and troughs and cyclones? ron

I'm wondering about any additional details about getting struck by lightning. here's a video..let me know of anything else.

What was it like during the days of Velociraptor and Protoceratops? Was it all just one large, harsh dessert? Or did it have any lush tropical areas like classic depictions of dinosaur-age Earth?

Imagine Earth is at an angle similar to Uranus' 97 degree spin. With Australia is the northernmost continent, what is the effect on geology and climate if the spin maintains it's counter-clockwise (Australia moving north) movement? Cosmology/Bonus question: Theories on Uranus' unusual rotation? Or what would be the gradual effect of turning Earth on it's side, hypothetically without a cataclysmic event as the cause.

I have to conduct an interview with someone who is able to answer questions (30) about "why we should invest more money into ocean exploration rather than space?" I am NOT a professional in the field, but I have to interview someone who is educated in the subject. I guess you can message me your replies so it's not to cluttered in here. *Please, do not cut and paste answers into my questions from different sources. If you can't answer it just specify. Just give the answers you know.* I would appreciate any feedback you have to offer. Question: "How we should invest more money on Ocean Exploration" These (pretty simple) questions are me interviewing you on “how we shou…

Found this piece of sediment . Looks to be some critters in it . They were covered. I prepped them a little

I have a friend who is big into Science and is adamant that we have a good grasp on how the World works. I can agree that Science has discovered many things about the Earth. I cannot agree that we have such a good grasp on the Earth yet to be able to state this with such conviction. 95% of our Oceans remain unexplored according to the National Ocean Service. According to live Science, we have discovered only 10% of living things on the Earth. In my opinion, Science has only barely scratched the surface on the Earth and what’s out there. If I knew only 10% of my multiplication tables, would it be reasonable for me to state I have a good grasp on multiplication tab…

Since earthquakes occure when energy is suddently released (with some chain reactions), could we prevent it by regularly shake the ground with devices or bombs in specific zones, so energy is often released in small scale.

Let's say in an alternate universe there is a stationary (as in no spin, no orbit, etc.) planet orbited by a star. Rather than having a continuous orbit, the star is capable of disappearing from one point and reappearing in another. It's movement patterns are irregular, sometimes remaining in one position for months or a few years, sometimes for weeks. What would the climate and/or weather of such a planet be like? What gravitational effects would a moon being added to the mixture cause? Would the moon cause the planet to move in some way, even with a still core? Additionally, what effect would the moon have if there were no bodies of water larger than a lake? What clim…

Found some pretty awesome photographs of things that I thought people might be interested in! Thought maybe we could create a thread to share the more extreme stuff.... Things like the supercell (Thunderstorm with a rotating updraft.... looks pretty mental...) Credit to this awesome photograph (and many more of the sort) Here. And this natural gas source that has been burning since the 70's! The doorway to hell.... P

is there anyone that appraises fossils. I don't want to sell any but I have to due to the amount of time I spend collecting here is some examples. I have tons more this is just a quick sample

hi all I would like anyone who has any information on the newly discovered "crossover point" in the mantle to share their findings with me..much thanks!!

Hi! I'm a science fiction author and I'm working on a project that involves atmospheric science, which is not something I am very familiar with. I was hoping someone could help me out. The setting is an earthlike planet. It takes place a few centuries after a global war; weapons of mass destruction were used at the end of the war. They had the after-effect of disturbing the atmosphere and creating incredibly strong wind currents that stretch for thousands of miles. Could someone point me to some good online and print resources to get me started understanding the basics? I do have a few questions: What specific conditions could create such an effect? (In ot…

Radar imaging of the Sahara desert shows rivers carved rocky soil underneath the sand. Where did all that huge amount of sand migrated from carried by winds, or was created and ended deposited there ? Is the sand depth currently increasing or decreasing ?

I have just started a Geology Group in the South West of England in EXETER . It is part of The University of the Third Age. We are enjoying ,in the initial weeks , seeing how Devon and the south west of England fit into geological history. I am not a Geologist but am enthusiastic for understanding of our Earth and the processes behind its formation. One of our members expressed the desire to know the setting of Geology of the Earth, as a whole, whats it all about Rocks,? Volcanoes,? Earthquakes,? Going out into the Field with a hammer?, or what ?, Its easy to plunge into specific detail of areas of Geology. But they are asking ' Whats it all About. ? …

Hi Guys, I am new here, and I have an urgent question. As I am taking some rock samples by using the KAPPAMETER. According to the factory instruction, the KAPPAMETER should be remove from the sample after 1/2 second after the button is pressed. But I did it in the outdated way, which is the hold the KAPPAMETER against the sample until the reading is taken. The raw data between the 2 methods are about 2.33x difference (Factory method is higher). I then conducted an experiment involving 270 samples. The general trends of the 2 set of data are very similar. The correlation relationship of this two sets of readings against the laboratory magnetic readings are pretty clos…

Hi everyone, first post. On the summer solstice in the northern hemisphere, the sun is directed as far north as the Earth's tilt will allow. I would then assume that solar energy delivered to the northern hemisphere of the Earth would be at its peak on the summer solstice and dwindle slowly after the solstice - correct? I would also assume this reduction in solar energy after the solstice is symmetrical, i.e. the rate it reduces is equal to the rate it increases before the solstice so that a graph of solar energy would be symmetrical around the peak at the summer solstice. So the solar energy the week before the solstice is exactly the same as the energy the w…

I've never lived in British Columbia but I always thought that British Columbia is supposed to be a cold and mountainous region with plenty of snow during the winter months and plenty of rain during all the seasons of the year (including in the summer months). This makes sense because British Columbia is located in the pacific northwest and the pacific northwest region (which British Columbia is part of) is famous for it's abundance of days with lots and lots of rain. So why are there so many forest fires in British Columbia (Canada) if it's a relatively cool and rainy place?