What are the elements of earth magnetic field at a place,emergency preparedness and response plan training treats,21st century insurance yahoo answers - Plans Download

Observations show, that values of each element of the Earth magnetic field are permanently changing. When checked, Shutterstock's safe search screens restricted content and excludes it from your search results. Earth's magnetic field, geographic and magnetic north and south pole, magnetic axis and rotation axis and the planets inner core in three-dimensional scientific depiction. Others assume that radioactive decay causes the heat, but with the advent of nuclear plants and control rods, it would take some very precise levels to control the heating process. All of these people are getting an above-average dose of radiation from the granite used to construct Grand Central Station. The second point here, that there would be naturally occurring radiation exposed by volcanic eruptions is absolutely right.
Even with any explanation that would hold some degree of credibility, you would need a source of fuel to provide the necessary heat source so that it could operate and release the required energy. The question goes on to suggest that since there is no way that the Earth could maintain its internal heat, it must be young and therefore creationists are right. If we are obtaining heat from these different things, beside earth rotation how do we have seasons? Just thinking out loud: what is the possibility that the radiation of charged particles in a gravitational field could play a role in the generation of planetary internal heat? Enter your email address to subscribe to this blog and receive notifications of new posts by email. We glossed over the idea that the outer core of the Earth creates the magnetic field and the magnetosphere for the planet. Magnetic needles have a special property that links them with astronomy, the most highly developed science of the ancient world.
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Lava is molten, but the earth being only 8,000 miles in diameter has no internal heat source. Also, with radioactive decay, there would naturally be some radiation that would be present in many different ways and in all probability, would be exposed with any volcanic eruption. About half of the earth’s interior energy does come from the radioactive decay of naturally occurring isotopes. Any rocks erupted that contain significant amounts of potassium, thorium, and uranium will have measurable amounts of radioactivity. This heat source would require precision controls to avoid catastrophic results. Do you see my dillema? Given the size of our planet, no internal fuel or heat source could possibly sustain itself for millions of years, let alone billions of years given the mass and quantity required. I see the point about the need for precision controls on the Earth’s temperature, but a planet is a complicated thing, especially the earth with its active plate tectonics, huge oceans, and active water cycle. Ken studied geology at the University of California, Berkeley and earned his PhD in planetary science at Caltech working with Mariner 9 images of the south polar layered deposits on Mars. Take a geiger counter into Grand Central Station or the Vatican if you don’t believe me. The Earth climate system is made of countless interacting feedback loops that serve to moderate the planet’s temperature. As I explained above, simple decay of radioactive isotopes provides about half of the Earth’s heat, and will continue to provide heat for billions of years. Ryan has a background in Physics and Astronomy and received his PhD in Planetary Science from Cornell University. Many suppose that extreme pressure causes heat, but at the deepest depths of the ocean where the pressure is very high, it is also very cold. As air moves downward, it is compressed and warms up, which is why descending into the grand canyon or death valley in summer is a bad idea.
His research helped lead to the selection of the Gale crater landing site for the Curiosity rover, and he is on the science team for the ChemCam instrument on Curiosity.


If you take a physics course, you'll learn that magnetism and electricity are very closely related.
It’s true that a nuclear reactor needs to be maintained at a precise temperature to continue the fission reaction without going critical and melting down, but that has nothing to do with the radioactivity that heats the earth. When a planet forms, the material falling in to form it has to release its gravitational potential energy, and much of that energy is released as heat. Likewise, once you have a protoplanet, as the iron begins to sink through the molten bulk of the planet and settles in the core, it again releases gravitational potential energy and heats the planet. Ryan is also a member of the science team for the SuperCam instrument on the upcoming 2020 rover. Radioactive isotopes of potassium, uranium, and thorium spontaneously decay into more stable daughter elements no matter what temperature they are at. The only way to get rid of heat from the planet is thermal radiation, which is actually a pretty inefficient way to transfer energy, so planets can remain warm for a long time even without radioactive heating. Ken serves as polar geology theme lead for the High Resolution Imaging Science Experiment (HiRISE) on the Mars Reconnaissance Orbiter (MRO) mission. The magnetic field created in the center of the planet makes your compass point north and protects the Earth from solar winds. You could have a single atom of uranium, floating alone in frigid deep space, and it would still eventually decay and release some energy. In fact, Jupiter and Saturn are still giving off significantly more heat than they receive from the sun: they are really massive so there was a lot of gravitational energy involved in their formation, and their inner layers are actually still contracting and producing additional heat!



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