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During various times in the geologic past the polarity of Earth's magnetic field has been reversed - True or False?
Wiki User
∙ 13y ago
True. These are known as magnetic reversals.
Please see the related link for more information.
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoYes, in the past.
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Why does a terran have a different geologic history from that of the surrounding area?
The terrain can be different from the surrounding are because, of different reasons. It would be flooding, tectonic plates moving, or various other reasons.
Which geological events destroy a part of the rock record?
Uplift and erosion over a long period of time are some of the various geologic events that can occur to eventually destroy a part of the rock record
Difference between magnetic and non-magnetic materials?
Simple answer: Magnetic materials are affeted by magnets while non magnetic materials are not Advanced: Magnetic (or paramagnetic) materials have unpaired electrons, causing atoms to align in a certain pattern when a magnet is introduced
The rate of seafloor spreading can be calculated by?
b. Knowing the various dates for the magnetic pole revesals, and the distance from the location of a known reversal site to the ocean ridge.
What is the procedure to draw magnetic field lines?
If it is a small magnet, like one that you can hold in your hand, place the magnet on a flat surface, put a white sheet of paper over it, take iron shavings or shavings from a magnetic metal, and sprinkle them on the paper. Gently shake the paper if you have to. You should start to see lines from where the magnetic fields attracted the metal.
Is the moon changing polarity as well as the sun and is this what has caused the various natural disasters which have happened in the last couple of weeks?
No. For one thing, the moon does not have a polarity. The sun's magnetic field is constantly shifting, but it is currently not doing anything out of the ordinary. Third, shifts in magnetic fields do not affect natural disasters on Earth.
How are geologic units of similar ages shown on a geologic map?
A geologic map shows geologic units of various rock types and ages. Geologic units of similar ages are shown on a geologic map using the same color and symbol.
What do the colors on a geologic map represent?
Geologic maps use color to represent various types of geologic features or units (a particular type of rock with a known age range).
Where can you get a geologic map of southern Italy?
The geologic map of Southern Italy can be found at the Geological Mapping department in Italy. It contains information on the various geologic features in Southern Italy.
How can scientist tell that earth's magnetic field sometimes reverses direction?
You don't have to be a scientist to observe that fact. All you have to do is take any magnet and hang it up on a thread, so it's free to rotate and point wherever it wants to point. When you do that, you find that every magnet that's free to turn always turns to point at the same place ... a spot in far northern Canada. When you do this experiment with thousands of magnets in thousands of places all over the earth, and keep records of the direction that magnets point in various places, it all goes together to give a beautiful diagram of the earth's magnetic field. People who do a lot of traveling over long distances have used this fact for thousands of years to build a device that helps them find their way around the surface of the earth. The device is called the 'magnetic compass'.
What do colors represent on a geological map?
Geologic maps use color to represent various types of geologic features or units (a particular type of rock with a known age range).
How paleontologists use trilobite fossil as index fossil for various geologic time period?
yeah
What is ICN polarity?
Polarity in international relations is any of the various ways in which power is distributed within the international system. It describes the nature of the international system at any given period of time.
What is magnetic field therapy?
Magnetic therapy is the use of magnets to relieve pain in various areas of the body.
How paleontologists use trilobite use fossils as index fossils for various geologic time periods?
yeah
Is ZnO magnetic?
ZnO , chemically called zinc oxide is not magnetic at all.It is a white powder used in various small industries , like electro plating, as a filler in various application.
How do paleontologist use trilobite as index fossil for various geologic periods?
Trilobites were rapidly evolving and widespread marine organisms that spanned a number of geologic time periods. Certain types of trilobites only appeared in specific segments of geologic time; therefore, when one of these trilobites is found, you can be certain that the rock layer it is found in is of a certain geologic age.
