What was mohorovičić's observation?
seismic waves travelled at constant speeds.
seismic waves penetrated all earth's layers.
seismic waves could not go through the brittle crust.
seismic waves travelled at varying speeds.

Seismic waves traveled at varying speeds.

Explanation:

The Moho Discontinuity was discovered by one Croatian seismologist, Andrija Mohorovicic. He realized that the speed of a seismic wave depends on the density of the material the wave is moving through. Mohorovicic interpreted the acceleration of seismic waves observed within the Earth's crust as a change in composition of matter within the Earth.

✿   this landform has a high elevation and a high relief

✿   this landform is a mountain

acceleration= v2-v1/t so 8m/s-3m/s / 3s =to 8/3 or

2.67 m/s^2

hope i

-lavira: )