A scientific hypothesis may be regarded as a tentative explanation of observed facts or events
Indicate whether the statement is true or false
TRUE
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Reserves, by definition, must be all of the following except
A. all rock types that are likely to host as yet undiscovered ore. B. exploitable with current technology. C. identified ore deposits. D. economically profitable to mine at present.
Organizations such as the Small House Society are helping people
A) dig wells for drinking water and grow vegetable gardens near their homes. B) get help from institutions such as the World Bank and city governments. C) embrace a simpler lifestyle and reduce consumption and their ecological footprint. D) relocate into the rural countryside, where agricultural jobs are abundant.
A rawinsonde does not measure
A) air composition. B) wind direction. C) air temperature. D) humidity. E) air pressure.
The only biogeochemical cycle of any significance is the carbon cycle.
a. true b. false