Which of the following best describes the process by which magma reaches Earth's surface during a volcanic eruption?

A. Magma builds up in the strata until is it released through the vent crater to form lava.

B. Magma builds up in the vent until it is released through the magma chamber at different strata.

C. Magma builds up in the crater then travels through the strata until it is released through the vent.

D. Magma builds up in the magma chamber through the vent until it is released through the crater.

Which is the layer underground where all empty spaces are filled with a combination of air and water ?

Aradio signal from a gps satellite take only about 0.067 seconds to reach a gps reciever. if the speed of light is about 300,000km/s, then approximately how far away is the reciever from from the satellite?

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.