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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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
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
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.