Which information is needed to construct a geomagnetic time scale? Select the two correct answers.(1 point)

Question

Responses

the average speed of tectonic plates on Earth
the average speed of tectonic plates on Earth

the age of rocks along the surface of Earth
the age of rocks along the surface of Earth

the magnetic direction of rocks along the surface of Earth
the magnetic direction of rocks along the surface of Earth

the length of the mid-oceanic ridge
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 age of rocks along the surface of Earth
2. The magnetic direction of rocks along the surface of Earth

These two factors allow scientists to understand how the Earth's magnetic field has changed over time and how these changes correlate with the formation and age of rocks on the Earth's surface.

Answer 2

At which type of plate boundary would a string of small volcanic islands most likely form?(1 point)
Responses

divergent ocean-ocean boundary
divergent ocean-ocean boundary

transverse boundary
transverse boundary

convergent ocean-ocean boundary
convergent ocean-ocean boundary

convergent ocean-land boundary

Answer 3

A string of small volcanic islands is most likely to form at a convergent ocean-ocean boundary. At this type of boundary, one oceanic plate subducts beneath another, leading to the formation of volcanic arcs and islands through the melting of subducted material and subsequent volcanism.