(earth science)
what are three lines of evidence that support the hypothesis that our sea floor spreads apart at ocean ridges. name and describe in detail.

Three lines of evidence are given below.

Explanation:

There is ample evidence that suggests the hypothesis of seafloor spreading along the deep oceanic ridges. Harry Hess back in 1960 is supposed to have given valuable evidence in the history of deep-sea exploration. His theory of evidence came after the pronounced theory of Alfred Wegener. One of them being  

Magnetic Anomalies (paleomagnetism): These cover the entire ocean floor in terms of bands of hard and soft rock. The magnetic reversals that have been documented from studies of land. Positive anomalies in paleomagnetic theories suggest that the lava or magma which upon solidification of either side of the ridges took the direction of the earth's magnetic alignment and similarly with that of the negative anomalies.  

Age of seafloor: The oldest known seafloor is a date about 200 million years. Indicating that older seafloor has been destroyed by a trench some years ago. Similarly, the younger oceanic crust can be found along the ridges as compared to older far apart.

Seismic studies. This proof comes from the earthquake produced along the rift valleys of mid-oceanic ridges and the cross-cutting feature that offset it. Because of the way the sea floor spreads the transform faults are found along with the boundaries of these ridges. Both for in the opposite direction of mid-oceanic ridges.

hola:

ef0: daños leves. algunas tejas caídas y otras pequeñas piezas de los tejados arrancadas, algunos daños en canaletas, ramas de árboles rotas y algunos árboles poco profundos arrancados. los tornados que no causan daños visibles (por ejemplo aquellos que se producen en campos abiertos) se valoran siempre como de ef0.

ef1: daños moderados. tejados seriamente despedazados, caravanas y casetas volcadas o seriamente dañadas, perdida de puertas exteriores y ventanas y otros cristales rotos.

ef5: daños increíbles. las casas fuertes pueden quedar arrasadas hasta los cimientos, las estructuras de hormigón armado dañadas críticamente, los edificios altos sufren graves deformaciones estructurales. devastaciones increíbles.

y según esto creo que puedes sacar tus conclusiones. y la verdad la escala ef10 si no se decirte por que no la eh visto o mejor dicho estudiado. espero que te sirva. suerte.