can you show me examples of a continental shift pattern?
929460
In the past I have done two types: four 12 hour days, four days off, four 12 hour nights four days off rotating, with approx 23 personal days. We also did four 12 hour days, six days off, four 12 hour nights, six days off rotating, in the summer we would have sixteen days off, but no personal days; these were paid back by working the two middle days of a six off and the first days off after the four days directly after the 16 off were worked as nights, but both these days only happened once after your sixteen off. There were five shift teams working at the factory but only two were ever in, one day shift one night shift.\nAs a footnote, these shifts are well paid and you do get a lot of time off, but sometimes that time can be Monday to Saturday and you could end up working through the weekend. Also it plays havoc with your health. I worked these shifts for almost 14 years, my social life went t1ts up, and in my last few years I suffered from IBS, because of the irregular shift patterns.\n\n\n\nDo you know what it's like when you half read a question when you've had a few beers and answer it totally wrong? \nSorry mate!
370987
It varies all the time. It has even completely reversed many times over geologic history, but I have never heard any good theories as to why.
933188
The idea of Continental Drift was the forerunner of Plate Tectonics Theory. At the time that Wegener proposed the idea of Continental Drift, he did not have sufficient information to explain the physical mechanisms that would have allowed continents to break apart and drift apart. He did have fossil evidence, and shape-of-the continents evidence, and matching-rocks-on-both-sides evidence that the continents had indeed been juxtaposed. "A fatal weakness in Wegener's theory was that it could not satisfactorily answer the most fundamental question raised by his critics: What kind of forces could be strong enough to move such large masses of solid rock over such great distances? Wegener suggested that the continents simply plowed through the ocean floor, but Harold Jeffreys, a noted English geophysicist, argued correctly that it was physically impossible for a large mass of solid rock to plow through the ocean floor without breaking up."http://pubs.usgs.gov/gip/dynamic/historical.html\n\nLater, when scientists discovered magnetic striped on the ocean floor, learned more about the seismicity at trenches, and so forth, they were able to put together a more comprehensive model of the actual physical processes that could and do cause the continents to "drift" apart, or collide together. These processes come under the heading of Plate Tectonics--which includes the ideas of three types of plate boundaries, including the divergent boundaries with spreading ridges required for continents to "drift" apart. \nThe website below will give you illustrations and discusses both continental drift and plate tectonics.
1169235
Yes. The tectonic plates that make up the earth move a few centimeters a year. No one denies that except for people who do not believe in earthquakes (or understand what they are). So over a long enough period of time the movement would move the continents. If you look at the shapes of the various continents they clearly fit together. Coincidence? Maybe. But rationally speaking it seems like the safe bet is Pangea really did exist. Not to mention the fossil records that support the theory.
89723
Some are moving away from each other (i.e. their separation is increasing), such as Africa and South America. Some are moving closer together, like North America and Asia. Some places continents or pieces of continents are moving past each other, like in the Pacific Northwest, or in the Afar Triangle in Somalia. Some places are expanding, like Iceland. \n\nThere are lots of ways to measure this, but the first clue that something was going on came from looking at the shapes of coastlines. Look at the coastlines of western Africa and eastern South America. They look like they could fit together, like a puzzle. The rocks match each other on both continents too, as if the two continents were once fit together. \n\nHowever, the big clue that something was going on came from magnetic stripes on the sea floor. As new basalt forms in the middle of the Atlantic, and some other oceans, it pushes out from the central mid-ocean ridge, and cools. When it cools, it sets, taking on a magnetization aligned with the magnetic field of the earth at that moment. However, the earth's magnetic field flips every few thousand years (just like the Sun's does, every 11.5 years or so). This creates a record of magnetic stripes on the sea floor that alternate polarity. When the scientists Vine and Mathews saw this, they knew they had proved that plate tectonics existed, and that the continents were moving (sometimes away from each other, and sometimes towards each other or past each other)
603115
volcanos\ntectonic plates movements
668139
I remember reading somewhere that the great New Madrid earthquake in the early 1800s was so powerful that it caused the Mississippi River to flow in the opposite direction for a time.  I imagine that tectonic activity - movement that changes the shape of the earth's crust - would do it.
396884
continental drift explained why similar plants and animals were found on opposite on the ocean, similarly why similar fossil assemblages and rock types were found on opposite sides of the ocean, for example in Europe and North America , and Africa and South America. Continental drift explained these occurrances by suggesting that the landmasses had previously been joined but had split, and the new continents drifted apart, taking animals plants rocks, fossils with them.\n\nIt also explained why marine fossils were found on top of mountains, as the theory of continental drift suggested that just as continents drifted apart, they could also collide, and the collision would raise the landmass up.\n\nIt also explained why volcanic activity occurs in certain places in the world, ie along the edges of moving plates.
63495
Techtonic scientist who study continental drift (which is ongoing) believe that at one time long ago almost all land masses were collected into a huge circle called Pangea (meaning all land).  When it split up to drift into present locations it was probably pure coincidence why pointy parts of land masses pointed one way rather than another.  My pet theory is that luna tides (that affect the oceans and earth's crust) may have biased the direction of "cracks" in the land masses, but perhaps I'm just a luna-tick.  Incidentally the term lunatic originally applied to scientists who met once a month when they could travel at night with the aid of the light of a full moon.
603387
A novel experiment to demonstrate doppler shifting\n\n\n\nA novel experiment to demonstrate doppler shifting\nThere are many everyday examples of the Doppler effect - the changing pitch of police and ambulance sirens, train whistles and racing car engines as they pass by. \n\nIn each case, there is an audible change in pitch as the source approaches and then passes an observer. The effect arises because sound waves arrive at the listener's ear closer together as the source approaches, and further apart as the sound waves recede. The faster the object is moving, the greater the effect.\n\nTo illustrate the Doppler shift and the effect that the distance to the source has on it, Jean-Pierre Lebreton performed the following simple experiment:\n\nA video camera recorded a scooter, blaring its horn, approaching and passing by the cameraman. Two recordings were made; the first one while the cameraman was standing close to the road on which the scooter was driving, the second one some distance away from the road. The video clips and associated sound files are featured below. The sound files were analysed with an audio analysis programme (see the related links) and the result of the analysis is shown in the graph to the right of each video clip.\n\nThe graphs show the spectral analysis of the signal. The main horn frequency is just below 4000 Hz, but you can see that the horn spectrum is rich in harmonics. Note the fast change in tone (frequency) at around 7 seconds in the top graph - this is around the point when the scooter passes the cameraman. Before that point, the scooter was approaching the cameraman (the frequency increases); after that, the scooter was moving away (the frequency decreases). \n\nThe bottom graph shows a much smoother frequency change. This is because the Doppler effect depends on the relative movement toward or away from the observer, not on absolute movement. With increasing distance between the source (the scooter) and the observer (the cameraman), the relative movement towards or away from the observer becomes smaller and thus the Doppler shift diminishes.
334932
The axis of the earth shifts seasonally.
462582
the missisippi doesnt normally but it has before. sometime in the early 1900's (i cant remember when) a large earthquake, i think in the mossouri region, actually shifted the earths crust enough for it to run backwards for a short time. this was isolated however and has only happened once in recorded history
844842
I'm pretty sure it's called the Coriolis Effect. You can look it up.
868199
Countries on the southern hemisphere. Think about the tilting earth as it orbits. Australia would be a good example.
771697
Try Google or Yahoo.  You'll find worked examples there.  I think it needs diagrams to understand; they and the accompanying explanations are too complex to attempt to reproduce here.
127042
1. continental drifting\n\nVery slow but substantial changes.\n\n2. changes in sun's energy\n\nSuspected to be large, but not yet demonstrated conclusively.\n\n3. variations in the positions of the earth relative to the sun\n\nFairly small effect. \n\n4. volcaic eruptions\n\nLarge observable effects in global temperature etc. \n\n5.greenhouse effect\n\nKeeps the earth about 60 degrees F warmer than it would be otherwise.\n\n6. global warming\n\nIn the last hundred years, the earth has warmed measurably. It is not clear if this is due to human activities or not, but many suspect it is.\n\n7. air pollution\n\nHas increased the ozone depletion at the poles in springtime, which introduces more UV lower into the air column. This might be changing the climate, although it is not known for sure.\n\nAlso blocks sunlight locally near sources of soot. It is not clear how big an effect this has globally, but it might be a cooling factor. \n\nAcid rain produced by S02 emissions has been involved in some deforestation, which has probably had an effect on the climate, but again this is not known for sure.
976140
c causes the graph to shift right (if c <0) ir left (if c>0),\n\nd causes it to shift up (if d>0) or down (if d < 0)