The distance light travels in a year, called a(n) ________, is used by astronomers to measure stellar distances
Fill in the blank(s) with correct word
light year
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Which of the following revicers int he region of Sub-Saharan Africa is considered to be an "exotic river"?
A. the Niger River B. the Congo River C. the Zambezi River D. the Volta River
Where would you NOT be permitted to build a house in a U.S. Government-regulated floodway?
a. in the regulatory floodway b. in the regulatory floodway fringe c. on the river side of the standard project flood limit d. on the side of the regulatory flood limit away from the river e. outside of the standard project flood limit
In the present day, what is the most valuable non-living commodity obtained from sea floor?
A) oil and gas B) sand and gravel C) gas hydrate D) gold
Which of the following is NOT a measure of biological diversity?
A) Genetic diversity B) Ecosystem diversity C) Species diversity D) Species diversity, genetic diversity, and ecosystem diversity are all measures of biodiversity.