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Earth got its north and south Pole's have geographic and magnetic north and south poles which makes an angle of nearly 5.6degree. magnetic field created due to core of earth is reversed during each 100 million year period. ie.magnetic north becomes south and vice's. seafloor spreading is a continuous event so for each 100my spread seafloor we get opposite polarised magnetic substances. That is called magnetic reversal
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What is the name of maps that show depths of water and the shape of the seafloor?
Hydrographic surveys, which support the nautical charts used by mariners.
What do digital cameras have instead of film?
It could have any storage support witch can sustain binary information's. (magnetic cards, flash storage cards and usb, CD , DVD, etc etc etc)
Is earths magnetic field slowly reducing?
Scientists are still struggling on what are the sources of earth's magnetic field (EMF). The facts support the notion that the EMF has reversed its direction several times in earth's history. When the EMF reverses, the EMF intensity will be weakened. Some evidence supports that the EMF intensity is now peaking and is due for a complete reversal in thousands of years. So yes, the EMF will be weakening. What we should worry about is what effects do the sun's activities have upon the EMF in our lifetime. The solar winds can weaken the EMF too. Scientists are predicting major solar activities coming (check the related link). ======================
What observation support the conclusion that protons are positively charge?
The motion of the proton in a magnetic field, F= qvxB.
What is the difference between simple support and pin-joint support?
We tend to use them to mean the same thing. In two dimensions, a simple support is one that allows rotation. A pin joint support is a simple support that allows rotation but not translation. A roller joint support is a simple support that allows rotation and translation.
How is magnetism used to support the theory about seafloor spreading?
Magnetism is used to support the theory of seafloor spreading through the study of magnetic stripes on the seafloor. These stripes are aligned with the Earth's magnetic field and provide evidence for the process of seafloor spreading, where new oceanic crust is formed at mid-ocean ridges. As the crust cools and solidifies, the magnetic minerals in the rocks align with the Earth's magnetic field, creating a record of magnetic reversals over time that support the theory of seafloor spreading.
What do magnetic reversals help support?
Magnetic reversals in Earth's history help support the theory of plate tectonics by providing evidence of seafloor spreading and the movement of lithospheric plates. They also assist in dating rocks and determining the age of oceanic crust.
How does seafoor age and magnetic clues support seafloor spreading?
Seafloor is youngest near the mid-ocean ridges and gets progressively older as you move away from the ridge. Magnetic stripes on the seafloor provide evidence of seafloor spreading, as they show alternating patterns of normal and reversed magnetic polarity that match the Earth's magnetic reversals over time. This supports the theory of seafloor spreading as new oceanic crust is created at the mid-ocean ridge and spreads outward.
What magnetic reversals help support?
the theory of sea-floor spreading
What properties of iron bearing minerals on the seafloor support the theory of seafloor spreading?
iron bearing minerals can record Earth's magnetic field direction. when Earth's magnetic field reverses, newly formed iron bearing minerals will record the magnetic reversal. magnetic reversals show new rock being formed at mid-ocean ridges. This helped explain how the crust could move
How do earth's magnetic signatures support the idea that continents move?
Scientists indicated that the seafloor was spreading, so the poles "reverse"
How does the land of ice and confirm seafloor spreading?
The land of ice, particularly in regions like Greenland and Antarctica, provides valuable geological evidence for seafloor spreading through the examination of glacial deposits and ancient rock formations. As tectonic plates move apart at mid-ocean ridges, new crust is formed, which can be observed in the age and composition of rocks on land. The alignment of magnetic minerals in these rocks also reflects the history of seafloor spreading, revealing periodic reversals of Earth's magnetic field. These geological features support the theory that continents drift as new oceanic crust forms beneath the ice.
How is magnesium used to support the theory of seafloor spreading?
Magnesium is used to support the theory of seafloor spreading because as new oceanic crust forms at mid-ocean ridges, it contains higher levels of magnesium compared to older crust. This can be observed through magnetic anomalies in the oceanic crust, where variations in magnesium content create distinct magnetic stripes that align with the spreading centers. This provides evidence that new crust is being continuously generated at mid-ocean ridges, supporting the process of seafloor spreading.
Describe how magnetism is used to support the theory of seafloor spreading?
New material is added to the sea floor when sea floor spreading occurs. When the iron cools it is magnetized by the magnetic field of the earth.
Is the analysis of seafoor sediments evidence of sea-floor spreading?
Not really but sea floor sediments thickness increase with increased distance from spreading centers which is good evidence. Other evidence such as magnetic reversals, temperature, dating methods provide the best evidence of seafloor spreading
Magnetic reversals have helped to support?
the theory of plate tectonics, as geologic evidence shows that the Earth's magnetic field has reversed multiple times in the past. This phenomenon has provided crucial data that helps scientists understand the movement of the Earth's tectonic plates and the dynamics of the planet's interior.
How seismic studies support seafloor spreading?
Seismic studies show evidence of mid-ocean ridges where new oceanic crust is forming, supporting the theory of seafloor spreading. By analyzing seismic waves, scientists can map the structure of the ocean floor and identify areas of tectonic activity where plates are moving apart. Additionally, seismic data reveals the presence of magnetic striping on the seafloor, further supporting the idea of seafloor spreading.
