Question

What was Mohorovičić's observation?(1 point)
Responses

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.
Seismic waves travelled at varying speeds.

Seismic waves penetrated all Earth's layers.

Answer 1

Mohorovičić's observation was that seismic waves travelled at varying speeds. This led to the discovery of the discontinuity between the Earth's crust and the underlying mantle, known as the Mohorovičić discontinuity or "Moho."

Answer 2

a b c or d

Answer 3

The correct response is **c**: Seismic waves travelled at varying speeds.