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Which aspect of magnetic reversal provides evidence of continental drift?
Periodically, the magnetic field of the earth reverses polarity. The direction of the magnetic field is recorded in the magnetic properties of rocks when they are erupted. Rocks are being continuously added at sea floor spreading regions, and thus the magnetic reversals are recorded as pairs of parallel 'stripes' alongside the mid ocean spreading ridge.
What is a magnetic period?
A magnetic period is a specific duration of time during which the Earth's magnetic field undergoes reversals, where the magnetic North and South poles switch places. These reversals occur over thousands of years and are recorded in rocks and sediments as a series of stripes of alternating magnetic polarity.
Magnetic strips on the seafloor are caused in part by?
Magnetic strips on the seafloor are caused in part by seafloor spreading, where new oceanic crust is formed at mid-ocean ridges. As the crust cools and solidifies, it locks in the polarity of the Earth's magnetic field at the time, creating a recorded history of magnetic reversals. This process creates alternating stripes of normal and reversed polarity as the seafloor expands.
Rock on the ocean floor provided the final proof of sea floor spreading with a record of?
magnetic stripes on either side of the Mid-Atlantic ridge. These parallel bands of alternating polarity were mirrored on each side of the ridge, providing evidence for seafloor spreading and the movement of tectonic plates.
What are the polarity of earth's north and south poles?
The Earth's North Pole is a magnetic south pole and the South Pole is a magnetic north pole. This means that the North Pole of a compass needle points towards the Earth's magnetic South Pole, and vice versa.
Which type of current is produced by a wire breaking magnetic field lines and changing the polarity?
An alternating current (AC) is produced when a wire cuts through magnetic field lines and experiences a change in polarity. This phenomenon is known as electromagnetic induction, where the changing magnetic field induces a current in the wire.
How do the parallel magnetic stripe near mid ocean ridge form?
These stripes often called zebra stripes, due to the alternating colors of the original magnetometer readings. When the first observations were made, it is directly related to two processes geomagnetic reversals and seafloor spreading.
What evidence was discovered in the 1960's that supports plate tectonic theory?
Alternating bands of magnetic polarity as you move away from the mid-Atlantic ridge.
Describe how the polarity of earth's magnetic field is recorded in the sea-floor?
Magnetic minerals in the Earth's crust align with the planet's magnetic field at the time of their formation. When new oceanic crust is created at mid-ocean ridges, these minerals record the direction of the Earth's magnetic field on the sea-floor. This creates alternating stripes of normal and reversed polarity as the sea-floor spreads.
Which aspect of magnetic reversal provides evidence of continental drift?
Periodically, the magnetic field of the earth reverses polarity. The direction of the magnetic field is recorded in the magnetic properties of rocks when they are erupted. Rocks are being continuously added at sea floor spreading regions, and thus the magnetic reversals are recorded as pairs of parallel 'stripes' alongside the mid ocean spreading ridge.
What is the type of current in the maglev train ac or dc?
maglev train works on alternating current..The electric current supplied to the coils in the guideway walls is constantly alternating to change the polarity of the magnetized coils. This change in polarity causes the magnetic field in front of the train to pull the vehicle forward, while the magnetic field behind the train adds more forward thrust.
Which current is having high polarity?
ac(Alternating Current ) has the high polarity.
What is a magnetic period?
A magnetic period is a specific duration of time during which the Earth's magnetic field undergoes reversals, where the magnetic North and South poles switch places. These reversals occur over thousands of years and are recorded in rocks and sediments as a series of stripes of alternating magnetic polarity.
Magnetic strips on the seafloor are caused in part by?
Magnetic strips on the seafloor are caused in part by seafloor spreading, where new oceanic crust is formed at mid-ocean ridges. As the crust cools and solidifies, it locks in the polarity of the Earth's magnetic field at the time, creating a recorded history of magnetic reversals. This process creates alternating stripes of normal and reversed polarity as the seafloor expands.
How were scientists able to use rock on the ocean floor to determine that the Earth and magnetic field has changed direction?
Scientists studied the alignment of magnetic minerals in oceanic rocks to determine that the Earth's magnetic field has undergone reversals in polarity. By analyzing the magnetic "stripes" on the ocean floor, they found alternating bands of rocks with normal and reversed polarity, suggesting that Earth's magnetic field has changed direction over time.
Do waves have magnetic polarity?
No, waves do not have magnetic polarity. Waves are disturbances or vibrations that propagate through a medium or space, and they do not possess magnetic properties. Magnetic polarity is a characteristic of magnetic materials such as magnets, where they have a north and south pole.
What is the pattern of magnetic polarity reversals?
In a geomagnetic reversal, the south and north magnetic poles flip locations. A magnetic pole reversal takes place every 450,000 years on average, but this is not regular. We are way overdue since the last reversal was 780,000 years ago. There is a pattern in the magnetic polarity of basaltic rocks on opposite sides of a mid-ocean ridge. Basalt contains tiny magnetic crystals that point to the location of the north magnetic pole at the time the lava cools. The rocks at the ridge have positive polarity, but on either side of the ridge the polarity is negative, indicating that those lavas cooled when the magnetic field was opposite of what it is today. On either side of the basalt with negative polarity are more rocks with positive polarity. This pattern continues on both sides of the mid-ocean ridge across the ocean basin. The pattern of magnetic polarity is one of the main lines of evidence for seafloor spreading, which is the mechanism for plate tectonics.
