A swimming pool of water is best classified as a
A. heterogeneous mixture.
B. pure compound.
C. homogeneous mixture.
D. pure element.
E. It depends on how many children have been in it.
Answer: C
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Some of the most problematic MSW in oceans are
A) heavy metals and other toxic elements from coal ash. B) wood, vegetation and paper originating from landfills and commercial shipping. C) food wastes dumped by large tourist liners. D) non-biodegradable plastics that contain toxic materials and circulate in huge gyres.
Match each country with its capital.
A) Tunis B) Muscat C) Cairo D) Algiers E) Baghdad F) Khartoum G) Tripoli H) San'a I) Tehran J) Ankara 65) Turkey 66) Sudan 67) Algeria 68) Tunisia 69) Libya 70) Egypt 71) Iraq 72) Iran 73) Yemen 74) Oman
Hurricanes are
A) cold-core systems with high pressure aloft. B) cold-core systems with low pressure is a. C) warm-core systems with high pressure aloft. D) warm-core systems with low pressure aloft.
A great deal of China's air pollution is due to ________
A) burning high sulfur coal B) nuclear fallout C) prevailing westerly winds blowing across the Takla Makan desert D) tourist bus traffic