How old is Earth?
What will be an ideal response?
Geochemical studies of rocks show that Earth is approximately 4.5 billion years old.
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Ultra-high voltage, digitally controlled _________ ___________ would be more responsive to local and regional changes in supply and demand of energy
Fill in the blanks with correct word
If demand forces metal prices up, all of the following can be expected except
A. development of lower-grade ore deposits. B. disturbance of more land area for mineral extraction. C. reclassification of some resources as reserves. D. significant rapid increases in total world metal resources.
The central American country that was carved out of Colombia in order to build a canal is
A. Nicaragua B. Costa Rica C. Panama D. Honduras
Silicon Valley is an example of an agglomeration economy
Indicate whether the statement is true or false