Question

A)
Which information is needed to construct a geomagnetic time scale? Select the two correct answers.
(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

Answer 1

To construct a geomagnetic time scale, the two correct pieces of information needed are:

1. The magnetic direction of rocks along the surface of Earth
2. The age of rocks along the surface of Earth

These two factors are essential for determining the changes in Earth's magnetic field over time and correlating those changes with geological time.