Which of the following is NOT a greenhouse gas?
A. nitrogen (N2)
B. methane (CH4)
C. nitrogen oxide (N2O)
D. water (H2O)
E. carbon dioxide (CO2)
Answer: A
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A main difference between electric forces and gravitational forces is that gravitational forces
A. repel or attract. B. act over shorter distances. C. obey the inverse-square law. D. only attract.
The zone of ____________________ is the portion of a glacier where additions exceed losses. Fill in the blank(s) with the appropriate word(s)
The use of enhanced recovery by an oil company
A) primarily depends upon the current market price of oil. B) is usually more cost effective than recovering oil using secondary recovery. C) has not yet been used because oil reserves remain abundant. D) is now routine, as every bit of oil is extracted from all available wells.
Romanian is a Slavic language but contains many Romance words
Indicate whether the statement is true or false