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.

Environmental & Atmospheric Sciences

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Water use in the United States increased exponentially from 1960 to 1995

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

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

Environmental & Atmospheric Sciences

In what year did world oil prices peak at $140 per barrel?

A) 1968 B) 1978 C) 1988 D) 1998 E) 2008

Environmental & Atmospheric Sciences

When two plates move together, lithosphere is ________

A) not changed B) created C) destroyed D) melted

Environmental & Atmospheric Sciences