Knowledge of Earth's interior is mostly derived from
A) direct sampling of the interior using deep-test wells.
B) work in Earth's deepest caverns and caves.
C) historic and prehistoric records.
D) indirect evidence involving the analysis of seismic waves.
D
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Summarize the main stages of the demographic transition
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All of the following are factors that affect rates of weathering except for ________.
a. rock characteristics b. geologic age of earth materials c. climate d. surface area
The soil horizon which includes incompletely weathered bedrock shards and perhaps the weathered upper surface of the bedrock is called the ______ horizon
a) A b) B c) C d) E e) O
All of the following about equinoxes is true, except
A) the solar declination is zero degrees. B) both hemispheres receive the same amount of insolation. C) every place has 12 hours of daylight. D) the solar angle at the North Pole is 90 degrees.