Question

Age of Rock Quiz
7 of 97 of 9 Items
Question
What was Mohorovičić's observation?(1 point)
Responses

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

Seismic waves travelled at constant speeds.
Seismic waves travelled at constant speeds.

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

Seismic waves travelled at varying speeds.

Answer 1

Mohorovičić's observation was that **seismic waves travelled at varying speeds.** This observation led to the identification of the Mohorovičić discontinuity (Moho), which is the boundary between the Earth's crust and the underlying mantle where seismic wave speeds change significantly.