Which of the following is the most toxic nerve agent?

a. Soman
b. VX
c. Sarin
d. Tabun


Answer: b. VX

Environmental & Atmospheric Sciences

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What is the clumping of smaller particles into large masses?

A) accretion B) nuclear fusion C) density stratification D) oxygen revolution

Environmental & Atmospheric Sciences

When the world's population reached 6 billion in 1995, it was forecast that at a steady rate of growth the population would reach 12 billion in approximately 45 years. That period of 45 years is known as

A) doubling time. B) doubling life expectancy. C) double increase rate. D) double overpopulation. E) double demographic transition.

Environmental & Atmospheric Sciences

In which layer of the atmosphere is the ozone layer found?

A) Troposphere B) Stratosphere C) Thermosphere D) Mesosphere

Environmental & Atmospheric Sciences

Which of the following most likely indicates that sea level has risen relative to the land?

A. an irregular coastline with branching estuaries and embayments B. offshore sandbars that have become coastal dunes C. marine terraces D. the presence of coral reefs on land E. wave-cut notches and platforms that are above sea level

Environmental & Atmospheric Sciences