The difference in arrival times of P and S waves increasese at seismograph recording stations because the farther a seismic recording station is from the earthquake epicenter.
As the P and S waves travel out from an earthquake the P waves get progressively farther ahead of the S waves. Therefore, the farther a seismic recording station is from the earthquake epicenter the greater will be the difference in time of arrival between the P and S waves.
S waves, which travel at about half the speed of P waves, arrive later. A seismic station close to the earthquake records P waves and S waves in quick succession. With increasing distance from the earthquake the time difference between the arrival of the P waves and the arrival of the S waves increases.
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b.) water
c.) iron
d.) coal
Impacts/results of global warming
Answer:
Correct Answer is A. Where People live and what cultures they create
Explanation:
The term Human systems Briefly summarize one of the main elements in Geographic Studies: The Human Geography. This element in geography studies how humans behave with their environment and with other human beings, how the communities behave, what is their culture, how they have changed the Landscape, what historic processes the community suffered. This element is one of the six subjects of geographic study:
1. The world in spatial terms (lat, long, positioning)
2. Places and Regions ( differences between one space and another)
3. Physical Systems ( Natural changes, Biosphere)
4.Human systems (Human geography)
5. Environment and society (Anthropic effects on the environment)
6. Uses of geography (combining the other elements to understand past, present, and future)