Earth's Processes: Tectonic Plates Unit Test

Question

11 of 1511 of 15 Items

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

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

the length of the mid-oceanic ridge
the length of the mid-oceanic ridge

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

the average speed of tectonic plates on Earth

Answer 1

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

1. The age of rocks along the surface of Earth - This helps to establish when certain magnetic orientations were recorded in the rocks.
2. The magnetic direction of rocks along the surface of Earth - This provides insight into the historical magnetic field orientations at various times, which is essential for constructing the time scale.

So, the correct answers are:

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