A)

Question

Which information is needed to construct a geomagnetic time scale? Select the two correctanswers.
(1 point)
the average speed of tectonic plates on Earth
the magnetic direction of rocks along the surface of Earth
the age of rocks along the surface of Earth
the length of the mid-oceanic ridge
A)

Answer 1

To construct a geomagnetic time scale, the two correct answers would be:

1. The magnetic direction of rocks along the surface of Earth - This information is crucial because the orientation of magnetic minerals in rocks can reveal the Earth's magnetic field direction at the time of their formation.

2. The age of rocks along the surface of Earth - Knowing the age of the rocks allows scientists to correlate the changes in magnetic direction with specific time intervals, thereby creating a timeline of geomagnetic reversals.

So, the correct answers are:

• The magnetic direction of rocks along the surface of Earth
• The age of rocks along the surface of Earth