Geologists apply various methods to study the layers of the Earth. Which of the following is NOT a method used to study the Earth’s layers? A. Scientists use seismic computer models to measure the atmospheric conditions above the Earth's crust

B. Scientists map seismic waves to determine the densities of materials that lie beneath Earth’s surface.

C. Scientists measure vibrations on Earth's surface using a seismograph (an instrument that measures seismic waves).

D. Scientists measure the time it takes for seismic waves to reach a seismograph (an instrument that measures seismic waves).

A. Scientists use seismic computer models to measure the atmospheric conditions above the Earth's crust

Explanation:

why would use atmosphere to study the layers of earth? dont think thats possible

option number c is the right answer.

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me