Which gas, contributed in part by burning fossil fuels, is used by scientists as an indicator of future global warming?
A) CO2
B) nitrogen
C) oxygen
D) hydrogen
Answer: A
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The most promising immediate alternative to gasoline fueled vehicles in a time of global climate change and the inevitable scarcity of oil is powering vehicles using
A) solar power. B) hydrogen as a fuel source. C) fuel cells using hydrogen. D) plug-in hybrid electric vehicles.
What do we mean by an essential fatty acid?
A) a fatty acid which the body needs so it can synthesize other fatty acids B) a fatty acid which must be part of our diets since we cannot synthesize it C) both a and b D) neither a nor b
A mT air mass is likely to be ________ than a cT air mass because the mT air mass ________
A) drier; is a cold air mass B) wetter; forms over the ocean C) drier; forms under the equatorial low D) wetter; is warmer than the cT air mass E) hotter; forms over the ocean
The highest mountain in Africa, Mt. Kenya (19,340 feet), is located in Tanzania near the border with Kenya.
a. true b. false