"Sweet" and "fresh" water are distinguished from each other on the basis of taste. Indicate whether the statement is true or false
F
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As air aloft moves from south to north, air leaves the southern area and "piles up" above the northern area. This redistribution of air ____ the surface air pressure to the south and ____ it to the north
A) raises; reduces B) reduces; raises C) raises; raises D) reduces; reduces
A tropical cyclone in the northern hemisphere rotates ________ and has a storm track turning ________.
A. counterclockwise; south and southeast B. clockwise; north and northeast C. counterclockwise; north and northeast D. clockwise; south and southeast
The decline in approximately 70% of the world's bird species is particularly alarming to scientists because
a. This is the first time any bird species have been threatened with declining numbers. b. It is not caused by any human activities that scientists can determine. c. Only land birds are affected, while water birds seem to be maintaining normal population numbers. d. Birds are excellent environmental indicators. e. Birdwatching now generates a significant portion of tourist dollars in some countries.
Cis-trans isomers do not exist for which of the following compounds, all of which have the molecular formula C3H4Br2?
A) 1,1-dibromopropene B) 1,2-dibromopropene C) 1,3-dibromopropene D) They do not exist for any of these three molecules.