Answer:
the earth surface is constantly changing from force in nature the daily process of precipitation wind and land moments result in changes to landforms over a long period of time driving forces into rows and volcanoes and earthquakes people also contribute to changes in the appearance of land
The main ethnic groups are White, African American, Native American, Alaska Native, Pacific Islander, Asian, and Native Hawaiian.
White=72.4%
African American=12.6%
Asian=4.8%
Alaska Native=0.9%
Native Hawaiian and other Pacific Islander=0.2%
Other 6.2%
Two or more races 2.9%
The 5 most languages spoken in the US are English, Spanish, Chinese, French, and Tagalog. But in all there are 25 languages spoken in the US. I am unsure of the percentages of those though.
Seismologists are interested in the possibility of the two faults being connected together is because two faults tells the possibility of upcoming of natural disasters like earthquake.
Seismic waves are the elastic waves that propagate in solid or fluid materials. They can be divided into the body waves that travel through the interior of the materials; the surface waves that travel along surfaces or interfaces between materials; and the normal modes, a form of standing wave.
There are the two types of body waves, pressure waves or primary waves (P-waves) and the shear or secondary waves (S-waves). P-waves are longitudinal waves that involves compression and expansion in the direction that wave is moving and are always the first waves to appear on the seismogram as they are the fastest moving waves through solids
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