April To the popular press, "hacker" means someone who breaks into computers. Among programmers it means a good programmer.
Good Science and Bad Science in the Movie Introduction Criticism always abounds when a movie having even a remote reference to science makes its debut.
The Core is no exception. Web sites denounce its validity, some calling it absurd and others "monumentally dumb" NY Times. Because Science Fiction is the genre into which one would categorize The Core, the implication is that facts are not the issue but rather entertainment, adventure, and surrealism are the paramount concerns.
One can be thoroughly entertained by the film despite scientific impossibilities and blunders. Within the realm of Sci-fi movies there is no bad Physics, bad Geology or bad Biology. Finding blunders does not necessarily detract from enjoying the film.
On the other hand, it makes watching it even more fun and challenging. In defense of the critics, it is a good thing to present truths and expose the impossible to the public in the interest of "good science".
Such a belief is the basis for this document. So, enjoy the movie but know the scientific facts! Good Geology Interior of the Earth The earth's interior was described and explained accurately in the movie.
We know the structure of Earth's Interior from observing the behavior of seismic waves generated during earthquake activity.
The main divisions are the: The mantle is further subdivided into zones based on seismic wave activity, these zones being the: It is true that the outer core is a rotating fluid, the composition of which is most likely dense iron and nickel.
The inner core is solid. Click the image to the left to enlarge it in a new window. USGS It is true that the crust we live on is the thinnest part of Earth and that it is the least dense rock: As stated in the movie, we have drilled into the crust to extract core samples for study and it is factual that scientists have only been able to penetrate about 10km 6.
Core samples are done into oceanic crust since it is thinner than continental crust. Continental crust averages 40 km to 70 km See How Thick is the Earth's Crust?
No one has ever been able to drill into, let alone travel down into, the depths of the mantle itself. Mantle rock is extremely dense, owing to the increase in pressure of overlying rock material.
Pressure increases with distance from the crust to the cores of the earth. Observe the Earth's Interior image to the left where both the densities are given as well as a graph illustrating the increase in pressure with corresponding increase in depth.
Extremely high temperatures in the liquid outer core drive a circular transfer of heat known as convection currents. The fluid core, with a radius of miles, is always in motion, spinning once a day at about miles per hour at the outer edge of the equator. The exact motion of the outer core fluid is not fully understood.
Some researchers have linked rotation of Earth, due to "original spin" at the time our solar system formed, to the rotation of the outer core.
The twisting force generated by this electromagnetic interaction may be what drives the inner core's rotation". Interior of the Earth ; Dr. It is also true that the magnetic field is generated by the rotation of the dense, iron, liquid outer core and that this field extends aboutmeters approx.
As the outer core fluid is driven by convection currents, a dynamo effect of circulating electric current is produced inside Earth, exactly as Professor Keyes explained in the movie.
The geomagnetic field protects us from harmful charged particles emitted by the sun. In fact, fluctuations in the strength of our magnetic field, due to intermittent solar flares, sometimes allow more cosmic radiation to reach Earth. An increase in cosmic radiation can temporarily affect power grids, cable and satellite reception and communications systems on spacecraft, enlarge atmospheric ozone holes and generate more aurora activity.
Larger magnetic fluctuations, called Magnetic Reversals, where the North and South Magnetic Poles flip their positions, have occurred many times in Earth's history, times in the last 71 million years, according to scientific evidence.
The average interval of magnetic field reversal is approximatelyyears. However, the last magnetic reversal happened approximately , years ago. Throughout all of geologic time, there is no evidence that the Electromagnetic Field ever ceased to function, or that the outer core ever stopped rotating as depicted in the movie.
Earth's Magnetic Dipole image: Click the image to the left for a larger and different view.I’m an expert on how technology hijacks our psychological vulnerabilities.
That’s why I spent the last three years as Google’s Design Ethicist caring about how to design things in a way that defends a billion people’s minds from getting hijacked. Modern technology has made the requirement for information flow to be quick and effective.
We have been able to achieve this through the. Good Science and Bad Science in the Movie Introduction. Criticism always abounds when a movie having even a remote reference to science makes its debut.
Good Reader, Bad Reader from Boston Review. Bad readers were not born, they were created. To know them is to understand literature and politics in postwar America. Published: Mon, 5 Dec Modern technology has made the requirement for information flow to be quick and effective. We have been able to achieve this through the internet; the medium i.e the internet has facilitated each of us, by making the communication cheap and fast.
There Are No Technology Shortcuts to Good Education. Kentaro Toyama. There are no technology shortcuts to good education.
For primary and secondary schools that are underperforming or limited in resources, efforts to improve education should focus almost exclusively on .