Formaldehyde is an especially problematic indoor pollutant because it is
A. Highly carcinogenic
B. Used in so many household materials
C. Produced naturally by the earth below buildings
D. Far more toxic than most other substances
E. So difficult to detect
Answer: B
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Who led Burma (Myanmar) from 1988-2011?
A) a repressive military regime B) a left-wing labor party C) an Islamic theocracy D) a centrist democratic party E) a wealthy monarchy
Which equation best describes the reaction represented in the illustration above?
A) 2 AB2 + 2 DCB3 + B2 ? 2 DBA4 + 2 CA2 B) 2 AB2 + 2 CDA3 + B2 ? 2 C2A4 + 2 DBA C) 2 AB2 + 2 CDA3 + A2 ? 2 DBA4 + 2 CA2 D) 2 BA2 + 2 CDA3 + A2 ? 2 DBA4 + 2 CA2
Precession of the equinox refers to ____
A) changes in the shape of Earth's orbit as it revolves around the sun B) changes in Earth's tilt as it orbits the sun C) changes in the seasons, especially from winter to summer D) the wobble of Earth on its axis
The type of structure shown on the right side of this figure is a(n)
A. syncline. B. dome. C. monocline. D. anticline. E. thrust fault.