How was the radius of Earth determined? Is Earth a perfect sphere?
What will be an ideal response?
Erastosthenes used geometric relationships to determine Earth's radius. This was later refined. Newton recognized Earth would bulge at its equator due to rotation, and calculated its radius, which would later be used to determine its mass, based on gravitational interaction with other planets.
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Which of the following best matches the description?Level area constructed on steep slopes for agricultural purposes.
A. humus B. windbreak C. leaching D. soil profile E. weathering F. horizon G. terrace H. friable I. parent material J. contour farming K. soil texture L. soil structure M. lithosphere N. chemical weathering O. mechanical weathering P. asthenosphere Q. loam
Water use in the United States increased exponentially from 1960 to 1995
Indicate whether the statement is true or false
In what year did world oil prices peak at $140 per barrel?
A) 1968 B) 1978 C) 1988 D) 1998 E) 2008
When two plates move together, lithosphere is ________
A) not changed B) created C) destroyed D) melted