Why Are the Travel-Time Curves for the P-Wave and S-Wave

question 2

Multiple Choice

Why are the travel-time curves for the P-wave and S-wave arrivals curved and not straight lines?

• A)The greater the distance, the deeper the P and S waves travel, refracting through progressively denser layers.
• B)During an earthquake, Earth shakes so much that it is like a quivering rubber ball and all of the distances are wrong.
• C)They should be straight lines.Earth is flat and the time-travel graph proves it!
• D)They have to bend with the curvature of the Earth.

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Definitions:

First Trimester

The initial stage of pregnancy, encompassing roughly the first 12 weeks, critical for the development of the embryo/fetus.

Sperm Fertilizes

The process by which a sperm cell unites with an egg cell, resulting in the beginning of pregnancy.

Zygote

The initial cell formed when a sperm cell fertilizes an egg cell, marking the beginning of a developing organism.

Myometrium

The muscular layer of the uterus that contracts during childbirth to help deliver the baby.