How old is Earth?

What will be an ideal response?


Geochemical studies of rocks show that Earth is approximately 4.5 billion years old.

Environmental & Atmospheric Sciences

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Silicon Valley is an example of an agglomeration economy

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

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

Environmental & Atmospheric Sciences

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

Environmental & Atmospheric Sciences

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.

Environmental & Atmospheric Sciences