0
50 times
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
The alignment of iron minerals in rocks when they are formed reflects the fact that Earth's has reversed itself several times in the past?
magnetic field.
What do bands of rock on the seafloor showing alternating magnetic orientation indicate about the earths magnetic field?
They indicate that the Earth's magnetic field has undergone shifting of the positions of it's poles several times in the past.
What has reversed itself many times which is proven by the alignment of iron minerals?
The Earth's magnetic field. This is proven by measuring the magnetic orientation of the rocks as you move away from the Mid ocean Ridge.
During various times in the geologic past the polarity of Earth's magnetic field has been reversed - True or False?
True. These are known as magnetic reversals. Please see the related link for more information.
Which observation about the mid atlantic ridge region probides the best evidence that the seafloor has been spreading for millions of years?
The fact that there is a series of magnetic 'stripes' on either side of the ridge. They show that the earth's magnetic field has reversed several times during the formation of the rocks, and this only happened about every 5 million years. (There is some evidence that this is speeding up).
Does the earths magnetic field has periodically reversed direction?
Yes. In historical times , clay pots have shown that the earth's magnetic field has reversed.
The alignment of iron-bearing minerals in rocks when they formed reflections the fact that earths has reversed itself several times in its past?
magnetic field .
The alignment of iron minerals in rocks when they are formed reflects the fact that Earth's has reversed itself several times in the past?
magnetic field.
How many times has the earth's magnetic field reversed itself in the past?
50
What do bands of rock on the seafloor showing alternating magnetic orientation indicate about the earths magnetic field?
They indicate that the Earth's magnetic field has undergone shifting of the positions of it's poles several times in the past.
The alignment of iron minerals in rocks when they are formed reflects the fact that Earth's has reversed itself several times in the past.?
magnetic field..
What has reversed itself many times which is proven by the alignment of iron minerals?
The Earth's magnetic field. This is proven by measuring the magnetic orientation of the rocks as you move away from the Mid ocean Ridge.
What is happening to earths magnetic field?
In early 2014, scientists have discovered that the Earth's magnetic field has been weakening for some time. This could eventually lead to the switching of the Earth's magnetic poles.
Can the charge of the north or south pole change?
Yes. The Earth's magnetic field has reversed, so that the magnetic north pole has become the magnetic south pole, several times that scientists are sure of. We know this because when magma (molten volcanic rock) cools, it freezes the magnetic orientation that the Earth's magnetic field imposed on the liquid magma.
Magnetometer data across a mid-ocean ridge shows alternating bands of?
As rocks cool past the curie point, they tend to become magnetized in the direction that the earths field is point at that time. The earths magnetic field has reversed many times in the past. The mid ocean ridge is a place where the plates are spreading apart and new hot material is welling up. This makes stripes of rocks that are magnetized in alternating directions.
During various times in the geologic past the polarity of Earth's magnetic field has been reversed - True or False?
True. These are known as magnetic reversals. Please see the related link for more information.
What do earths magnetic stripes indicate about ocean crust?
reversed itself in the pastThe alternating magnetic orientation is caused by polar shifts or reversal, (not end of the world kinda stuff). When the rock is new and molten the grains are free to align themselves with the prevailing magnetic field, as the rock cools, the grains are frozen in time. As the sea floor expands outward (in the Atlantic), it is regularly striped with rock oriented in different directions. This indicates that the magnetic poles have reversed many times throughout the Earth's history.
