Question

question 9 of 15 how do magnetic stripes show the history of earths magnetic field? a. as you move eastward along a continent, rocks get older. b. as you move down through the seafloor, rocks get older. c. as you move away from an ocean ridge, the rocks get older. d. as you move away from a coast, the rocks get younger.

Explanation:

Magnetic stripes on the seafloor are related to seafloor spreading. At ocean ridges, new oceanic crust forms and records the Earth's magnetic field at that time. As you move away from the ocean ridge, the crust (and its magnetic stripes) gets older because new crust is continuously formed at the ridge, pushing older crust outward. Option A is incorrect as continent - related rock aging doesn't relate to magnetic stripes. Option B: Moving down through the seafloor doesn't follow the correct age - progression pattern for magnetic stripes. Option D: Moving away from a coast doesn't relate to the magnetic stripe - based age pattern of seafloor rocks.

Answer:

C. As you move away from an ocean ridge, the rocks get older.