Which of the major rock types were most important originally in developing the geologic time scale,

and why? What will be an ideal response?


Sedimentary rocks, because they follow the principles of historical geology, and they contain fossils.

Environmental & Atmospheric Sciences

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Energy from the sun reaches Earth through ________

A. conduction B. gravity C. convection D. radiation

Environmental & Atmospheric Sciences

After many years of planning, trains could travel all the way from Adelaide to Darwin in ________, reducing the isolation of the Northern Territory capital and the towns along the rails

A) 1888 B) 1913 C) 1945 D) 2001

Environmental & Atmospheric Sciences

________ is the principle that says the same processes and natural laws that operated in the past are those we can actually observe or infer from observation as operating at present.

A. Uniformitarianism B. Actualism C. Relativism age D. Absolutism E. Numericalism

Environmental & Atmospheric Sciences

Forests provide habitats for about ____ of the earth's terrestrial species.

A. one-quarter B. one-third C. one-half D. two-thirds E. three-quarters

Environmental & Atmospheric Sciences