The most abundant gases in Earth's atmosphere by volume are?
a. ?carbon dioxide and nitrogen.
b. ?oxygen and water vapor.
c. nitrogen and oxygen.
d. ?oxygen and helium.
e. ?oxygen and ozone.
ANSWER: c
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What is the mission of ASEAN (Association of Southeast Asian Nations)?
A) ASEAN was created to improve education in the region. B) ASEAN is a military alliance (like NATO). C) ASEAN is a free -trade association, like NAFTA or the European Union. D) ASEAN's primary goal is to clean up the environment in the region. E) ASEAN fosters regional cooperation and regional coherence.
A dry surface has a higher infiltration capacity than a moist surface
Indicate whether the statement is true or false
The mean surface temperature of Earth is about ________.
A. 10°C B. 5°C C. 16°C D. 26°C E. 22°C
The hot circulating water at divergent plate boundaries metamorphoses basalt and gabbro, turning minerals within them to ________ minerals such as amphibole.
A. light-colored B. index C. hydrous D. stable E. nonsilicate