Which of the following can occur when seismic waves encounter a layer in Earth's interior?
A) Absorption
B) Change in speed
C) Reflection and/or refraction
D) Reflection, refraction, absorption, and change in speed
E) Seismic waves cannot penetrate below the crust of Earth.
D
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In the mid-1900s the main sources of immigrants were
A. Africa and the Middle East B. Australia and New Zealand C. Northern and Western Europe D. Asia and Latin America
Atmospheric features that cover large portions of the earth and are maintained for weeks are considered
A) microscale B) mesoscale C) synoptic scale D) global scale
Biomes characterize regions with similar types of
A) vegetation and climatic conditions. B) animals and plants. C) soil, water systems, and animals. D) rocks, soil, minerals, and water.
Among the world's MDCs, the U.S. has the greatest wealth inequality, meaning wealth is concentrated among relatively few people
a. True b. False Indicate whether the statement is true or false