The Aboriginal population numbered approximately ________ upon European conquest?

A) 200,000
B) 1 million
C) 800,000
D) 750,000
E) 300,000


E) 300,000

Environmental & Atmospheric Sciences

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Most urbanization has taken place during the last hundred years

Indicate whether this statement is true or false.

Environmental & Atmospheric Sciences

Atmospheric shortwaves usually move __________ at a speed that is __________ than

longwaves. a. east to west, faster b. west to east, faster c. east to west, slower d. west to east, slower

Environmental & Atmospheric Sciences

The economics of solar electricity are

A) bleak because there is a large gap between the price of energy from coal and from PV cells. B) excellent for CSP technology but discouraging for PV cells. C) growing at a phenomenal rate as the current $60 billion industry is expected to double by 2020. D) less promising because the costs of ecosystem damage and pollution are not counted.

Environmental & Atmospheric Sciences

A chimpanzee on a space walk tosses his hat away. Both the chimp and his hat will move

A. a short distance and then gain speed. B. away from each other, but at different speeds. C. away from each other at the same speed. D. a short distance and then slow down.

Environmental & Atmospheric Sciences