Earth Science

Hi, thanks, anyone out there can tell me what is the width of the Earth's grey line, terminator or twilight zone? I know it varies from North to South and by the presence or absence of mountains so... I want this data; 1.The width of Earth's terminator at its thickest (at sea level) in a plain field (with no hills or mountains) 2.The width of Earth's terminator at its narrowest (at sea level) in a plain field (with no hills or mountains) 3.The average width of Earth's terminator, at sea level, in a plain field (with no hills or mountains); by average I mean mode (or, otherwisem the airthmetic-geometric mean, either way specify which kind of average is used, th…

Hello all My name is Andrew Salmons, and I'm currently studying for my masters at Kingston university. I've recently chosen to undertake my research paper on El Nino phenomenon. My chosen paper will be a complete overview of El Nino/La Nina and the effects it has worldwide on everything basically. Weather and climate to ecological aspects, and I will look to see if there is one major indicator that El Nino is currently in effect. So I'm signing up to scientific forums to gather as much information as possible from experts of the area, who could hopefully provide me with a comprehensive list of affects of El Nino which I could then study. I look forward to…

I have heard that there is a process where you can use Ozone and CO2 for soil contaminant removal. Has anyone heard of this?

Hans Rosling explains that we have recently reached "peak child": the number of children born per year, in an absolute sense, is at its peak. (Unlike "peak oil", it is not inevitable that it will go down though). He also explains why all predictions correctly say that we will get at least another 3 billion more people on our planet, despite this peak child. It is likely that we will max out at 10 billion people, due to the "Great Fill-Up". Please watch the video before discussing. All 13 minutes are well worth your time. I know that the title of the video is the relation between religion and the number of children born... but (spoiler alert) he concludes that there…

I want to post this topic because lately i learned something here and there about Nicola Telsa [Link removed], and i noticed that he has a lot to do with earth science, most of his inventions are based on natural occurrences around us. He is the scientist that influenced our world a lot, but sadly lot of people don't know anything about his work and his accomplishments. All interesting things u know about him, and all question u have please post here...

Has anyone ever heard such an idea? Since Yellowstone Supervolcano may destroy the USA and do great harm to the entire Earth, why not coax it to "let off steam" so it cannot erupt massively? In the process we would need to make Yellowstone erupt, but control the eruption so just enough ash goes into the stratosphere and blocks enough sunlight to halt global warming. Also use the heat to generate power. This would require tunneling into Yellowstone and creating a channel for it to erupt just enough to prevent a super eruption. Is this possible? If so, it would save the Earth from destruction, stop global warming, and even might serve as an energy source.

What I want to know is how to get ¨Hygroscopicity index¨. Does anybody know how? -edit- I need to know how hygroscopic is a Rock... A chart of values with ranges such as Non hygroscopic, Slightly hygroscopic. ...

According to this article: http://www.cracked.com/article_19461_6-b.s.-myths-you-probably-believe-about-americas-enemies.html We have a lot of misconceptions about international politics. I remember reading this article and thinking "okay, we may not get blown up, but we'll probably all die from upcoming natural disasters. I mean, our abuse of the world's resources have made the world unstable, leading to many natural disasters like the Haiti megaquake." But then again, these myths - the ones about foreign policy - were all quelled. Maybe the rumor about an unstable planet is similarly grounded in propoganda. Is there any real scientific truth to it?

Hi I just finished my first year of commerce, and have now switched to geology, I'm from Canada and the demand for geologists is very high. I would just like to get some advice from someone who has gotten a degree or is on course to get a degree in an area of science or more specifically geology. I'd just like to hear what advice you may have given yourself right as you were starting out in whatever science it was that you were involved in. Thanks!

Share your experience of survival and rescue with each other!

Is it true that radioactive elements contained within igneous rocks do not begin to decay until the magma from which these rocks were formed begins to cool? If so, why does the decay not begin until the magma cools?

Gravity needs mass to happen, right? So, theoretically, at the center of the Earth, mass is equivalent all around, and one would seem to be weight-less, right? In other words, the closer you get to the Earth's center, the less one should weigh. So, with that in mind, why did iron settle in the earth's interior during the initial Earth formation? Gravity would have drawn iron down initially, but due to the surrounding mass, that attraction of gravity would have been diminished, right? Where am I wrong in this discussion?

This may seem like a really dumb question, or even a joke, but I am genuinely curious about this. Note in the following video, the character, (Son Gohan) causes an Earthquake by tapping his foot. My question is, assuming that is actually possible, about how much energy do you think was output by the tapping of his foot? Just so we're clear, in that scene that is an actual Earthquake, not just the building shaking. I hope I put this in the correct section. It seemed like the best place for an Earthquake related question. Edit: Ignore the video title, this was the only youtube video I could find of this specific scene.

Why doesn't her breath show in weather cold enough to instantly turn airborne boiling water into snowy dust?

Hello, I have a mysterious rock I found a long time ago in my yard. I found it in my yard a couple years ago. The rock looks like nothing in the area, and I just want to know what it is. My first guess was obsidian, but my Earth Science teacher said he had no idea, and that it wasn't obsidian. It looks like it is starting to rust on the top. There are white specks on it, and it looks melted. Here are some pictures of it. I can post more if it would help. Thanks in advance! EDIT: Found in Wisconsin

This might be a silly topic as a first post, but I would really like some well-informed and helpful advice. As my topic indicated, I am looking for real expeditions to join: I have a degree in philosophy and am soon starting my PhD, and for various reasons and due to my somewhat versatile background, I am somewhat of a mixed soup of skills; from quantitative and qualitative research (social sciences) to philosophy and theory of science (both natural and social), some explorations in marine biology, archeology and earth sciences, environmentalist activism, to professional photography and writing as well as in proper development and humanitarian work in the South, and …

If I put something hot in a small plastic or metal lined box and pump the air out of this sealed box will that keep condensation from forming on the inside?

hello i am making a research and i need you to take this survey plz 2012 Survey i need it so much thank u any way

is calcium carbonate a sustainable resource?

This is to gain just that. Some of my research dives into history include Yellowstone's history. Since it's discovery somewhat after the maunder minimum or "little ice age," the caldera had been seen to have geisers. I'm of the opinion that it is not impossible for those leaks to be the earliest stages of fracture, thus eruption. We know very little about supervolcanoes, but if it has an area about 1500 times that of Mt. Saint Helens, the lava dome is more -plate-like so prone toward further fracturing in the caqse of more cold, meaning deep freeze, events. It would seem logical that if the area is already hotter than it used to be, thus expanded a bit, and known for havi…

Hi, I've heard that the earth's iron core hasn't melted because of the immense pressure it's under. Doesn't immense pressure cause immense heat?

If you skip to the 6:00 mark on Why Gravity Gets So Strong Near Dense Objects at Khan Academy, it shows how gravity pulls the interior of something outward from surrounding mass in all directions. Wouldn't this form a hollow region in the center of stars and planets? Isn't the gravity in that part the weakest compared to the rest of its body?

I had a sliver of hope for things to happen concerning global warming but now after research the masses opinions on global warming, I just have to admit now we are totally f@#ked. But here is a survey from September 2011...Today, 43 percent of Republicans believe global warming is the result of natural causes, up from 35 percent in 2010. we are totally f#$ked, 43% of republicans are dilusional. Nobody cares about global warming anyway it's only the end of the world as we know it. 17% of americans still believe global warming isn't happening. ONLY 27% of americans believe that "people are mostly responsible" for global warming. What the f*(king he!! is this? I can't beli…

How do we know they exist?

Hello, I have a question I'm hoping someone can help me out with re: a volcanic explosion that took place in Death Valley approx. 800 years ago, carving a half mile wide crater. This explosion has been described as: "would have created an atom-bomb-like mushroom cloud that collapsed on itself in a donut shape, then rushed outward along the ground at some 200 miles an hour, while rocks hailed down. Any creature within two miles or more would be fatally thrown, suffocated, burned and bombarded" My question is: Taking into account west to east wind patterns, what would be an estimate for how far east the cloud of ash and gases might have traveled before diss…