What was Mohorovičić's observation?(1 point)

Question

Responses

Seismic waves travelled at varying speeds.
Seismic waves travelled at varying speeds.

Seismic waves could not go through the brittle crust.
Seismic waves could not go through the brittle crust.

Seismic waves penetrated all Earth's layers.
Seismic waves penetrated all Earth's layers.

Seismic waves travelled at constant speeds.

Answer 1

Mohorovičić's observation was that seismic waves travelled at varying speeds. This discovery led to the understanding that there is a boundary between the Earth's crust and the underlying mantle, known as the Moho (Mohorovičić Discontinuity), where seismic wave speeds increase significantly.