Lanthanum is an example of a ___________ metal.
Fill in the blank(s) with the appropriate word(s).
rare-earth
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True or False: Earthquake body wave records allow scientists to construct an image of Earth's interior
Indicate whether this statement is true or false.
Describe the distinction between a primary pollutant and a secondary pollutant. Give an example of a primary pollutant and an example of a secondary pollutant. Explain the source(s) and effect(s) of each of these pollutants, and describe recent U.S
trends in atmospheric concentrations of each.
This figure depicts what type of boundary?
A. oceanic divergent boundary B. transform boundary C. ocean-ocean convergent boundary D. continental collision E. ocean-continent convergent boundary
Which of these is most important for splitting the Sun's light into its separate colors?
A) diffraction B) interference C) internal reflection D) reflection E) refraction