What happens to P- waves and S-waves when they encounter the core-mantle boundary, and what does
this change in behavior indicate about the core? What will be an ideal response?
P-wave velocity abruptly decreases, and S-waves disappear, meaning that at least the outer core must
be liquid
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Which of the following compounds has polar covalent bonds?
A. Ne B. CsF2 C. H2O D. S8 E. CH4
The state of Texas is BEST considered a formal region because
A) only one language is spoken in most of the cities of the region. B) the same state laws apply everywhere in the region. C) religion is the same everywhere in the region. D) transportation systems converge in the major highways of the region. E) it is a part of the United States.
Beaches can be made of volcanic rock
Indicate whether the statement is true or false
What is average albedo of Earth?
A. 90 percent B. 30 percent C. 60 percent