The refraction of sound is due to changes in wave
A. speed.
B. frequency.
C. direction.
D. all of the above
Answer: A
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Which of the following materials is most likely to undergo oxidation?
A. Na B. Na+ C. Cl2 D. Cl- E. both A and B
The Biosphere 2 experiment could be seen as a failure, or it could be seen as an affirmation that nature is exceedingly complex and should not be degraded or destroyed. How do you view Biosphere 2? Explain your answer.
What will be an ideal response?
The focus of the 2001 inquiry of the UN General Assembly into coltan mining in Congo was ________
A) stopping the mining and sale of coltan to western nations B) diverting 30% of the profits from coltan into UN agencies like USESCO and FAO C) controlling the high price of the ore charged by the Congolese government D) environmental and social justice for the Congolese E) allowing more western nations to benefit from the importation of coltan
Air displacement at a zone of discontinuity between two air masses of different temperature, pressure, humidity, wind speed and direction, and cloud development is an example of ________ lifting
A) convergent B) convectional C) orographic D) frontal