Which of the following minerals has a metallic luster?
A) quartz
B) galena
C) diamond
D) halite
Answer: B
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Judge the following sentence according to the criteria given below: Carbon does not limit primary productivity BECAUSE various forms of carbon are quite abundant in the ocean
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.
Which one of the following is not used to disinfect treated wastewater ready to be released into natural waterways?
A) Chlorine gas B) Ammonia C) Ultraviolet light D) Ozone
What was the name for the series of routes that linked Asia and Europe for 2000 years of trade?
A) Byzantium Terminus B) Himalayan Highway C) Khyber Pass D) Long Trek Eastward E) Silk Road
Which of the following is not an important factor in the production of rain by the collisioncoalescence
process? a. the updrafts in the cloud b. relative size of the droplets c. the number of ice crystals in the cloud d. cloud thickness e. the electric charge of the droplets